Question

calculati a)31-5[(60-5×9):3]= b)2×[50+)50:10+35):5-4×7]= c)100-[39-(100-9×7)+7]×8= 8+2×[5-(3×6-4:2):8]-1= ​

Answer 1

Răspuns:

a)31-5 (60-45):3=31-5 (15:3)=31-(5x5)=31-25=6

b)2x [50+(5+35):5-28]= 2x [50+(40:5-28)]=2x[50+(8-28)]=2x (50-20)=2x30=60