100 days of
Adding & Subtracting
2-digit & 3-digit Numbers
(for grades 2 and 3, and review)
Day 1
Day 2
Day 3
Day 4
Day 5
Day 6
Day 7
Day 8
Day 9
Day 10
Day 11
Day 12
Day 13
Day 14
Day 15
Day 16
Day 17
Day 18
Day 19
Day 20		 Day 21
Day 22
Day 23
Day 24
Day 25
Day 26
Day 27
Day 28
Day 29
Day 30
Day 31
Day 32
Day 33
Day 34
Day 35
Day 36
Day 37
Day 38
Day 39
Day 40		 Day 41
Day 42
Day 43
Day 44
Day 45
Day 46
Day 47
Day 48
Day 49
Day 50
Day 51
Day 52
Day 53
Day 54
Day 55
Day 56
Day 57
Day 58
Day 59
Day 60		 Day 61
Day 62
Day 63
Day 64
Day 65
Day 66
Day 67
Day 68
Day 69
Day 70
Day 71
Day 72
Day 73
Day 74
Day 75
Day 76
Day 77
Day 78
Day 79
Day 80		 Day 81
Day 82
Day 83
Day 84
Day 85
Day 86
Day 87
Day 88
Day 89
Day 90
Day 91
Day 92
Day 93
Day 94
Day 95
Day 96
Day 97
Day 98
Day 99
Day 100


The standard algorithm (line up & carry/borrow) is a fourth grade standard.
Second and third grades should be using drawings, empty number lines, expanded form, mental strategies like make-a-ten, etc.
Second should work towards fluency to 100 (2.NBT.B.5) and understanding to 1,000 (2.NBT.B.7).
Third should work towards fluency to 1,000 (3.NBT.A.2).

This webpage gives you a 5 day rotation of types of problems, to cover ALL possibilities.
Each day has two 2-digit problems on top and two 3-digit problems on bottom, in a 5 day rotation.
2 problems are written horizontally and 2 are written vertically.
Four types per day rotation Then Day 6 restarts the 5-day rotation of problem types, and so on.

Day 1

1)
86
−24
62
2) 47 + 36 = 83
3) 827 − 365 = 462
4)
218
+364
582
Estimate, Solve, Check examples

Day 2

1) 52 − 38 = 14
2)
34
+25
59
3) 284 + 645 = 929
4)
751
−436
315
Estimate, Solve, Check examples

Day 3

1) 58 + 47 = 105
2)
94
−31
63
3) 378 + 557 = 935
4)
864
−231
633
Estimate, Solve, Check examples

Day 4

1)
36
+43
79
2) 82 − 59 = 23
3) 325 + 8 = 333
4)
512
−349
163
Estimate, Solve, Check examples

Day 5

1) 28 + 34 + 17 = 79
2) 47 − 9 = 38
3)
704
−286
418
4)
243
+156
399
Estimate, Solve, Check examples

Day 6

1) 68 + 27 = 95
2)
93
−41
52
3)
217
+374
591
4) 956 − 372 = 584
Estimate, Solve, Check examples

Day 7

1)
41
+28
69
2) 71 − 46 = 25
3) 382 + 497 = 879
4)
642
−318
324
Estimate, Solve, Check examples

Day 8

1) 59 + 36 = 95
2)
87
−52
35
3) 469 + 478 = 947
4)
975
−432
543
Estimate, Solve, Check examples

Day 9

1)
52
+17
69
2) 64 − 29 = 35
3) 90 − 7 = 83
4)
603
−278
325
Estimate, Solve, Check examples

Day 10

1) 8 + 56 = 64
2) 15 + 27 + 38 = 80
3)
124
+375
499
4)
803
−457
346
Estimate, Solve, Check examples

Day 11

1) 28 + 38 = 66
2)
43
−23
20
3) 324 + 349 = 673
4)
438
−168
270
Estimate, Solve, Check examples

Day 12

1)
20
+42
62
2) 42 − 18 = 24
3)
672
+180
852
4) 381 − 252 = 129
Estimate, Solve, Check examples

Day 13

1)
49
−40
9
2) 27 + 54 = 81
3)
257
+197
454
4) 347 − 210 = 137
Estimate, Solve, Check examples

Day 14

1) 32 − 18 = 14
2)
84
+45
129
3)
645
−169
476
4) 62 + 1 = 63
Estimate, Solve, Check examples

Day 15

1) 45 − 7 = 38
2) 33 + 70 + 15 = 118
3)
703
+226
929
4)
505
−109
396
Estimate, Solve, Check examples

Day 16

1)
76
−55
21
2)
67
+56
123
3) 409 − 116 = 293
4) 534 + 418 = 952
Estimate, Solve, Check examples

Day 17

1)
83
−75
8
2) 47 + 82 = 129
3) 333 + 574 = 907
4)
988
−679
309
Estimate, Solve, Check examples

Day 18

1)
97
+19
116
2) 26 − 23 = 3
3)
357
+478
835
4) 549 − 113 = 436
Estimate, Solve, Check examples

Day 19

1)
21
+54
75
2)
62
−34
28
3) 87 + 1 = 88
4) 633 − 476 = 157
Estimate, Solve, Check examples

Day 20

1) 52 + 16 + 45 = 113
2) 5 + 15 = 20
3)
806
−717
89
4)
241
+228
469
Estimate, Solve, Check examples

Day 21

1)
95
+27
122
2)
96
−31
65
3) 674 − 292 = 382
4) 306 + 288 = 594
Estimate, Solve, Check examples

Day 22

1)
37
−19
18
2) 34 + 25 = 59
3) 164 − 137 = 27
4)
212
+691
903
Estimate, Solve, Check examples

Day 23

1) 51 − 21 = 30
2) 43 + 37 = 80
3)
671
−251
420
4)
169
+485
654
Estimate, Solve, Check examples

Day 24

1)
71
+40
111
2) 97 − 28 = 69
3) 657 − 3 = 654
4)
442
−349
93
Estimate, Solve, Check examples

Day 25

1) 6 + 80 = 86
2) 34 + 22 + 60 = 116
3)
906
−267
639
4)
642
+302
944
Estimate, Solve, Check examples

Day 26

1) 68 − 48 = 20
2) 97 + 39 = 136
3)
337
−163
174
4)
655
+128
783
Estimate, Solve, Check examples

Day 27

1) 88 − 59 = 29
2) 20 + 58 = 78
3)
254
+453
707
4)
655
−136
519
Estimate, Solve, Check examples

Day 28

1) 58 + 69 = 127
2)
43
−33
10
3) 479 + 341 = 820
4)
163
−110
53
Estimate, Solve, Check examples

Day 29

1)
64
−59
5
2)
55
+24
79
3) 91 − 8 = 83
4) 916 − 359 = 557
Estimate, Solve, Check examples

Day 30

1) 23 + 28 + 27 = 78
2) 26 − 4 = 22
3)
806
−268
538
4)
304
+342
646
Estimate, Solve, Check examples

Day 31

1)
83
−43
40
2) 29 + 82 = 111
3) 814 − 162 = 652
4)
417
+325
742
Estimate, Solve, Check examples

Day 32

1)
77
+42
119
2)
23
−17
6
3) 298 + 580 = 878
4) 387 − 178 = 209
Estimate, Solve, Check examples

Day 33

1) 58 + 62 = 120
2)
18
−16
2
3)
555
+197
752
4) 172 − 110 = 62
Estimate, Solve, Check examples

Day 34

1)
82
−23
59
2)
91
+24
115
3) 590 − 1 = 589
4) 752 − 283 = 469
Estimate, Solve, Check examples

Day 35

1) 91 − 3 = 88
2) 48 + 14 + 34 = 96
3)
904
−169
735
4)
414
+423
837
Estimate, Solve, Check examples

Day 36

1) 19 − 18 = 1
2)
48
+28
76
3)
715
+137
852
4) 442 − 372 = 70
Estimate, Solve, Check examples

Day 37

1)
47
−29
18
2) 73 + 43 = 116
3) 233 + 291 = 524
4)
685
−239
446
Estimate, Solve, Check examples

Day 38

1)
99
+13
112
2) 93 − 60 = 33
3)
528
−510
18
4) 466 + 469 = 935
Estimate, Solve, Check examples

Day 39

1)
90
−89
1
2) 93 + 34 = 127
3)
882
−586
296
4) 300 − 71 = 229
Estimate, Solve, Check examples

Day 40

1) 56 + 38 + 29 = 123
2) 17 − 2 = 15
3)
908
−659
249
4)
539
+350
889
Estimate, Solve, Check examples

Day 41

1) 68 − 33 = 35
2)
67
+23
90
3) 941 − 881 = 60
4)
869
+113
982
Estimate, Solve, Check examples

Day 42

1) 24 + 40 = 64
2)
64
−28
36
3)
273
+376
649
4) 211 − 103 = 108
Estimate, Solve, Check examples

Day 43

1) 49 + 18 = 67
2) 22 − 11 = 11
3)
276
+646
922
4)
287
−134
153
Estimate, Solve, Check examples

Day 44

1)
74
−16
58
2) 46 + 61 = 107
3) 254 − 32 = 222
4)
303
−208
95
Estimate, Solve, Check examples

Day 45

1) 1 + 75 = 76
2) 44 + 40 + 40 = 124
3)
128
+411
539
4)
604
−178
426
Estimate, Solve, Check examples

Day 46

1)
79
+13
92
2) 49 − 36 = 13
3)
613
−152
461
4) 335 + 409 = 744
Estimate, Solve, Check examples

Day 47

1)
60
+17
77
2)
36
−19
17
3) 272 + 656 = 928
4) 593 − 356 = 237
Estimate, Solve, Check examples

Day 48

1)
56
+58
114
2) 60 − 20 = 40
3) 156 + 699 = 855
4)
252
−241
11
Estimate, Solve, Check examples

Day 49

1) 41 + 14 = 55
2)
34
−16
18
3) 76 + 8 = 84
4)
387
−289
98
Estimate, Solve, Check examples

Day 50

1) 7 + 41 = 48
2) 17 + 15 + 36 = 68
3)
607
−328
279
4)
456
+212
668
Estimate, Solve, Check examples

Day 51

1)
57
+73
130
2)
11
−10
1
3) 258 − 168 = 90
4) 202 + 118 = 320
Estimate, Solve, Check examples

Day 52

1)
72
+14
86
2) 32 − 14 = 18
3) 664 + 240 = 904
4)
580
−166
414
Estimate, Solve, Check examples

Day 53

1) 68 + 69 = 137
2)
16
−10
6
3)
782
−732
50
4) 497 + 153 = 650
Estimate, Solve, Check examples

Day 54

1)
63
−26
37
2) 23 + 42 = 65
3) 82 − 7 = 75
4)
337
−198
139
Estimate, Solve, Check examples

Day 55

1) 58 + 11 + 40 = 109
2) 82 − 2 = 80
3)
608
−169
439
4)
210
+130
340
Estimate, Solve, Check examples

Day 56

1) 29 + 95 = 124
2)
78
−47
31
3)
971
−791
180
4) 128 + 835 = 963
Estimate, Solve, Check examples

Day 57

1)
81
−54
27
2) 31 + 91 = 122
3) 754 − 649 = 105
4)
190
+774
964
Estimate, Solve, Check examples

Day 58

1)
38
−30
8
2)
67
+67
134
3) 771 − 470 = 301
4) 258 + 265 = 523
Estimate, Solve, Check examples

Day 59

1)
44
+40
84
2) 45 − 17 = 28
3)
273
−175
98
4) 81 + 154 = 235
Estimate, Solve, Check examples

Day 60

1) 42 + 21 + 44 = 107
2) 91 − 9 = 82
3)
903
−497
406
4)
182
+406
588
Estimate, Solve, Check examples

Day 61

1)
33
−12
21
2)
49
+74
123
3) 747 + 135 = 882
4) 457 − 270 = 187
Estimate, Solve, Check examples

Day 62

1)
88
−79
9
2) 21 + 72 = 93
3)
312
−207
105
4) 380 + 457 = 837
Estimate, Solve, Check examples

Day 63

1) 69 + 69 = 138
2) 40 − 20 = 20
3)
494
+149
643
4)
705
−402
303
Estimate, Solve, Check examples

Day 64

1) 30 − 24 = 6
2)
81
+10
91
3) 892 − 81 = 811
4)
527
−298
229
Estimate, Solve, Check examples

Day 65

1) 41 + 6 = 47
2) 14 + 68 + 41 = 123
3)
211
+644
855
4)
505
−206
299
Estimate, Solve, Check examples

Day 66

1) 19 + 84 = 103
2)
39
−27
12
3) 541 − 161 = 380
4)
526
+436
962
Estimate, Solve, Check examples

Day 67

1)
22
+40
62
2)
96
−88
8
3) 633 − 229 = 404
4) 150 + 671 = 821
Estimate, Solve, Check examples

Day 68

1) 84 + 47 = 131
2) 85 − 62 = 23
3)
496
−245
251
4)
344
+297
641
Estimate, Solve, Check examples

Day 69

1)
72
−36
36
2) 14 + 40 = 54
3)
928
−729
199
4) 585 − 85 = 500
Estimate, Solve, Check examples

Day 70

1) 26 + 34 + 68 = 128
2) 35 + 1 = 36
3)
302
−105
197
4)
517
+210
727
Estimate, Solve, Check examples

Day 71

1)
19
+89
108
2) 30 − 20 = 10
3)
807
−552
255
4) 319 + 251 = 570
Estimate, Solve, Check examples

Day 72

1)
57
−48
9
2)
20
+31
51
3) 246 − 137 = 109
4) 251 + 678 = 929
Estimate, Solve, Check examples

Day 73

1) 78 − 40 = 38
2)
49
+38
87
3)
245
+578
823
4) 502 − 201 = 301
Estimate, Solve, Check examples

Day 74

1)
94
−39
55
2)
86
+11
97
3) 445 − 178 = 267
4) 7 + 43 = 50
Estimate, Solve, Check examples

Day 75

1) 67 − 9 = 58
2) 25 + 33 + 16 = 74
3)
127
+141
268
4)
707
−339
368
Estimate, Solve, Check examples

Day 76

1) 58 + 27 = 85
2)
60
−40
20
3) 269 + 629 = 898
4)
375
−181
194
Estimate, Solve, Check examples

Day 77

1)
81
+36
117
2) 34 − 18 = 16
3) 783 − 169 = 614
4)
115
+793
908
Estimate, Solve, Check examples

Day 78

1)
15
−11
4
2)
17
+78
95
3) 598 + 364 = 962
4) 126 − 113 = 13
Estimate, Solve, Check examples

Day 79

1)
21
−12
9
2) 12 + 77 = 89
3)
631
−484
147
4) 185 − 80 = 105
Estimate, Solve, Check examples

Day 80

1) 33 + 11 + 52 = 96
2) 34 + 5 = 39
3)
201
−152
49
4)
108
+581
689
Estimate, Solve, Check examples

Day 81

1)
55
+59
114
2)
41
−31
10
3) 256 + 126 = 382
4) 307 − 283 = 24
Estimate, Solve, Check examples

Day 82

1) 65 − 26 = 39
2)
80
+15
95
3) 251 + 668 = 919
4)
794
−256
538
Estimate, Solve, Check examples

Day 83

1)
68
+42
110
2) 97 − 36 = 61
3) 338 + 282 = 620
4)
912
−402
510
Estimate, Solve, Check examples

Day 84

1)
47
−39
8
2)
10
+62
72
3) 516 − 138 = 378
4) 253 + 84 = 337
Estimate, Solve, Check examples

Day 85

1) 79 − 6 = 73
2) 15 + 62 + 33 = 110
3)
565
+312
877
4)
708
−239
469
Estimate, Solve, Check examples

Day 86

1)
76
+16
92
2) 23 − 12 = 11
3) 632 − 392 = 240
4)
421
+429
850
Estimate, Solve, Check examples

Day 87

1) 63 + 65 = 128
2) 42 − 29 = 13
3)
825
−218
607
4)
643
+175
818
Estimate, Solve, Check examples

Day 88

1)
27
+25
52
2)
84
−21
63
3) 482 + 129 = 611
4) 868 − 313 = 555
Estimate, Solve, Check examples

Day 89

1)
28
+11
39
2) 65 − 47 = 18
3)
441
−342
99
4) 78 + 161 = 239
Estimate, Solve, Check examples

Day 90

1) 19 + 17 + 41 = 77
2) 83 − 4 = 79
3)
302
−253
49
4)
414
+272
686
Estimate, Solve, Check examples

Day 91

1)
29
−27
2
2) 25 + 85 = 110
3) 410 − 190 = 220
4)
329
+403
732
Estimate, Solve, Check examples

Day 92

1) 52 + 27 = 79
2)
75
−28
47
3) 682 + 131 = 813
4)
374
−266
108
Estimate, Solve, Check examples

Day 93

1)
36
+95
131
2)
93
−10
83
3) 584 − 462 = 122
4) 486 + 235 = 721
Estimate, Solve, Check examples

Day 94

1) 26 + 52 = 78
2)
55
−16
39
3)
763
−498
265
4) 1 + 586 = 587
Estimate, Solve, Check examples

Day 95

1) 10 − 6 = 4
2) 24 + 11 + 62 = 97
3)
211
+220
431
4)
503
−274
229
Estimate, Solve, Check examples

Day 96

1) 55 + 48 = 103
2) 46 − 43 = 3
3)
447
−261
186
4)
158
+614
772
Estimate, Solve, Check examples

Day 97

1) 50 + 34 = 84
2) 27 − 18 = 9
3)
982
−143
839
4)
233
+291
524
Estimate, Solve, Check examples

Day 98

1) 55 − 40 = 15
2)
63
+59
122
3) 824 − 422 = 402
4)
459
+256
715
Estimate, Solve, Check examples

Day 99

1)
55
+62
117
2)
20
−11
9
3) 588 − 22 = 566
4) 976 − 677 = 299
Estimate, Solve, Check examples

Day 100

1) 34 + 26 + 52 = 112
2) 95 + 3 = 98
3)
507
−308
199
4)
344
+235
579
Estimate, Solve, Check examples