78-(72-62)*4 37+(25-15)*3 49-(64-44):2

Question

78-(72-62)*4
37+(25-15)*3
49-(64-44):2

Comments

1)38 2)67 3)39

Answer 1

72-62=10
10*4=40
78-40=38

25-15=10
10*3=30
37+30=67

64-44=20
20:2=10
49-10=39