Răspuns:
A) 300 : 10 + 70 : 35 = 32 300 :10 = 30 + 70 :35 =2
30 + 2 = 32
B) 8 + 8 _ 16 : 2 = 8
8+8=16 _ 16: 2=8
16 _ 8 = 8
C) 100 _ 80 : 40 _ 72 : 3 = 74
80 : 40 =2 _ 72 : 3=24
100 _ 2 _ 24 = 98 _ 24 = 74
D) 56 : 2 + 39 : 3 + 48 : 12 = 45
56: 2 = 28 + 39 : 3 = 13 + 48 :12 =4
28 + 13 + 4 = 41 + 4 = 45