Grade 1 · Set C · Side 1 of 2
Tens take tens
C
Start Finish
Goal: 10 min for both sides
Score/ 48
Remember: Take tens away from tens. What is left is tens too.
170 − 30 =
290 − 80 =
380 − 40 =
480 − 10 =
590 − 50 =
660 − 40 =
7 = 60 − 20
8 = 70 − 30
980 − 60 =
10 = 80 − 20
11 = 90 − 30
1270 − 60 =
1360 − 10 =
1490 − 10 =
15 = 60 − 40
1680 − 30 =
17 = 70 − 10
1890 − 60 =
1960 − 20 =
20 = 70 − 60
2180 − 20 =
2270 − 40 =
2360 − 50 =
24 = 70 − 40
Grade 1 · Set C · Side 2 of 2
Tens take tens
C
Start Finish
Goal: 10 min for both sides
Score/ 48
2590 − 40 =
2660 − 30 =
27 = 80 − 40
28 = 80 − 70
2970 − 50 =
3090 − 20 =
31 = 90 − 60
3280 − 70 =
33 = 80 − 50
3470 − 20 =
3570 − 10 =
36 = 70 − 50
3790 − 70 =
38 = 90 − 40
3980 − 50 =
40 = 90 − 20
41 = 80 − 30
4290 − 30 =
43 = 60 − 10
44 = 60 − 50
45 = 90 − 80
46 = 60 − 30
47 = 90 − 10
48 = 90 − 70
Answer key · Grade 1 · Set C
Tens take tens
140
210
340
470
540
620
740
840
920
1060
1160
1210
1350
1480
1520
1650
1760
1830
1940
2010
2160
2230
2310
2430
2550
2630
2740
2810
2920
3070
3130
3210
3330
3450
3560
3620
3720
3850
3930
4070
4150
4260
4350
4410
4510
4630
4780
4820
Mark each answer, count the right ones and write the score on the sheet. Beat your own time next time.