Place Value
10 more
10 less
Double Digit Addition
10 more and 10 less
100

How many 10s are in 36

3

100

10 more of 56 and WHY

66 - because the 10s place changes and the 1s place stays the same

100

10 less of 93 and WHY

83 -  because the 10s place changes and the 1s place stays the same

100

25 + 31

76

100

67

10 more - 77

10 less - 57

200

How many 1s are 72

2

200

10 more of 43 and WHY

53 - because the 10s place changes and the 1s place stays the same

200

10 less of 31 and WHY

21 -  because the 10s place changes and the 1s place stays the same

200

47 + 20

67

200

34

10 more - 44

10 less - 24

300

How many 1s are in 68

8

300

10 more of 34 and WHY

44 - because the 10s place changes and the 1s place stays the same

300

10 less of 22 and WHY

12 -  because the 10s place changes and the 1s place stays the same

300

52 + 16

68

300

72

10 more - 82

10 less - 62

400

How many 10s are in 15

1

400

10 more of 14 and WHY

24 -  because the 10s place changes and the 1s place stays the same

400

10 less of 27 and WHY

17 -  because the 10s place changes and the 1s place stays the same

400

64 + 24

88

400

29

10 more - 39

10 less - 19

500

How many 10s are in 8

0

500

10 more 3 and WHY

13 - because the 10s place changes and the 1s place stays the same

500

10 less of 14 and WHY

4 - because the 10s place changes and the 1s place stays the same

500

15 + 12

27

500

21

10 more - 31

10 less - 11