8 + ___ = 16
16 − 8 = ___
2 + 4 = ___
___ − 2 = 4
8 + ___ = 11
11 − ___ = 8
50, 55, 60, 65
4 counters, 2 equal groups
4 ÷ 1 = 3
4 ÷ 2 = 6
4 ÷ 4 = 1
4 ÷ 2 = 2
total number of colored squares
total number of squares
54¢ − 31¢
600 − 200