Adding and Subtracting Two-Digit Numbers

Place Value

100

How many ones are in the number 20?

What is 0 ones?

200

What number is in the ones place in the number 45?

What is 5?

300

How many ones and tens are there in the number 67?

What is 6 tens and 7 ones?

400

What number is in the tens place in the number 70?

What is 7?

500

5 tens and 3 ones is what number? 

53?

Adding tens

100

23 + 10 =

What is 32?

200

24 + 30

What is 54?

300

63 + 20 =

What is 83?

400

78 + 10 =

What is 88?

500

58 + 20 =

What is 78?

Adding ones

100

24 + 4

28

200

31 + 6

37

300

23 + 6

29

400

45 + 6

51

500

67 + 7

74

Adding tens and ones

100

10 + 12 =

What is 22?

200

23 + 23 =

What is 46?

300

33 + 66 =

What is 99?

400

67 + 22 =

What is 89?

500

34 + 22 =

What is 56?