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Associative
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100

3 + 6 = 9

6 + 3 = 9

100

7 + 3 + 2 = 

10 + 2 = 12

100

7 + 3

10

100

What is this number: 17

Seventeen

200

9 + 3 = 12

3 + 9 = 12

200

9 + 4 + 1 = 

10 + 4 = 14

200

8 + 6 =

14

200

What does this sign mean: = 

Equal to; the same

300

8 + 9 = 17

9 + 8 = 17

300

4 + 7 + 6 = 

10 + 7 = 17

300

6 + 4 + 7 =

17

300

How many ones are in the number 16?

Six

400

17 + 4 = 21

4 + 17 = 21

400

2 + 8 + 8 = 

10 + 8 = 18

400

7 + 9 + 3 =

19

400

How many groups of ten are in the number 14?

One

500

5 + 5 = 10

5 + 5 = 10

500

10 + 5 + 5 = 

10 + 10 =

500

8 + 4 + 2 =

14

500

What is this number: 87

Eighty-Seven