85 − 69 = ___
444 − 138 = ___
8 × 0
3 × 8 = 24 and
6 × 8 = 40,
24 + 40 = 64
6 × 8 = 48,
24 + 48 = 72
3 × 6 = 18 and
8 × 8 = 64,
18 + 64 = 82
3 × 8 = 32 and
32 + 48 = 80
9 × 6
11 × 4
.
(6 + 9) + 4 = (9 + __) + 4
78¢ − 21¢ = __