Grade 1 · Set B · Side 1 of 2
The missing part
B
Start Finish
Goal: 10 min for both sides
Score/ 48
Remember: A whole is two parts. Find the part that is missing.
16 + = 10
29 − 1 =
3 + 6 = 10
410 − 4 =
52 = 11 −
66 + = 9
7 + 4 = 6
84 + = 7
91 + = 6
102 = − 3
112 + = 6
12 + 5 = 10
137 = 16 −
14 + 5 = 6
15 + 8 = 13
16 + 1 = 9
173 + = 10
182 = − 5
197 − 4 =
2012 − = 3
218 − 5 =
227 − 3 =
233 = − 4
249 − 6 =
Grade 1 · Set B · Side 2 of 2
The missing part
B
Start Finish
Goal: 10 min for both sides
Score/ 48
25 = 9 + 9
26 + 8 = 12
27 + 7 = 9
28 = 13 − 8
2910 − 8 =
308 = 2 +
31 − 5 = 7
32 + 3 = 6
338 = + 4
34 − 2 = 2
357 = + 5
36 + 2 = 7
375 + = 6
38 = 7 + 9
394 + = 8
409 = + 6
4112 = + 8
426 − 2 =
436 + = 14
44 = 7 + 5
452 + 9 =
46 = 4 + 6
47 = 6 + 6
487 − = 3
Answer key · Grade 1 · Set B
The missing part
14
28
34
46
59
63
72
83
95
105
114
125
139
141
155
168
177
187
193
209
213
224
237
243
2518
264
272
285
292
306
3112
323
334
344
352
365
371
3816
394
403
414
424
438
4412
4511
4610
4712
484
Mark each answer, count the right ones and write the score on the sheet. Beat your own time next time.