40 − 16
40 − 6
46 − 10
78 − 30
70 − 38
70 − 8
6 + 24
5 + 75
7 + 93
100 − 5
100 − 15
100 − 25
40 − 16 = 40 − (10 + 6) = 40 − 10 − 6 = 30 − 6 = 24
40 − 6 = (30 + 10) − 6 = 30 + (10 − 6) = 30 + 4 = 34
46 − 10 = (6 + 40) − 10 = 6 + (40 − 10) = 6 + 30 = 36
78 − 30 = (8 + 70) − 30 = 8 + (70 − 30) = 8 + 40 = 48
70 − 38 = 70 − (30 + 8) = 70 − 30 − 8 = 40 − 8 = 32
70 − 8 = (60 + 10) − 8 = 60 + (10 − 8) = 60 + 2 = 62
6 + 24 = 6 + 20 + 4 = (6 + 4) + 20 = 10 + 20 = 30
5 + 75 = 5 + 5 + 70 = 10 + 70 = 80
7 + 93 = 7 + 3 + 90 = 10 + 90 = 100
100 − 5 = (90 + 10) − 5 = 90 + (10 − 5) = 90 + 5 = 95
100 − 15 = 100 − (10 + 5) = 100 − 10 − 5 = 90 − 5 = 85
100 − 25 = 100 − (20 + 5) = 100 − 20 − 5 = 80 − 5 = 75