Page 64 - SPARK OF MATH book 4
P. 64
Add or subtract.
3 1 6 1 7 7 3
+ = + = + = + =
8 16 16 16 16 5 10
9 4 2 1
- = - = + = + =
18 9 3 6
5 3 7 5
- = - = + = + =
6 24 36 9
8 6 5 4
+ = + = + = + =
24 12 15 30
23 9 11 5
- = - = - = - =
48 24 22 11
64
