Grade 1 · Set D · Side 1 of 2
The missing part
D
Start Finish
Goal: 10 min for both sides
Score/ 48
Remember: A whole is two parts. Find the part that is missing.
14 + = 8
211 = + 3
3 − 3 = 8
410 − 4 =
5 − 8 = 7
64 − 1 =
78 = 11 −
89 = − 9
96 + = 13
1014 − = 7
11 = 7 − 1
12 = 7 + 4
138 = − 5
144 = − 9
153 = 12 −
1611 − = 7
17 + 2 = 7
1817 = + 8
199 = 16 −
205 = − 6
218 = + 6
22 = 8 + 2
23 + 9 = 11
24 − 8 = 6
Grade 1 · Set D · Side 2 of 2
The missing part
D
Start Finish
Goal: 10 min for both sides
Score/ 48
259 = 12 −
2613 − = 4
27 + 7 = 15
28 − 2 = 9
298 − = 4
306 = 15 −
3111 − = 4
32 = 6 − 2
339 = − 6
34 + 7 = 14
354 = 12 −
3615 = + 9
37 − 2 = 5
3818 − = 9
395 = 13 −
409 = − 8
4111 = + 8
42 − 8 = 4
4313 − = 9
4414 − = 6
45 − 9 = 3
469 = 15 −
47 − 3 = 9
489 = 18 −
Answer key · Grade 1 · Set D
The missing part
14
28
311
46
515
63
73
818
97
107
116
1211
1313
1413
159
164
175
189
197
2011
212
2210
232
2414
253
269
278
2811
294
309
317
324
3315
347
358
366
377
389
398
4017
413
4212
434
448
4512
466
4712
489
Mark each answer, count the right ones and write the score on the sheet. Beat your own time next time.