Question

91-22={90-20)-(1-2)=
74-48
67-59
45+47

Answer 1

Ответ:

91-22=(90-20)-(1-2)=70-1=69

74-48=(70-40)-(4-8)=30-4=26

67-59=(60-50)-(7-9)=10-2=8

45+47=(40+40)+(5+7)=80+12=92