Question

Calculeaza(20:10)×(24:4)= ,(7×7-35):2= ,65-a=(4×6:9) :7+2+8:8=

Answer 1

(20:10)x(24:4)=2x6=12

(7x7-35):2=(49-35):2=14:2=7

65-a=(4×6:9) :7+2+8:8

65-a=2.8:7+2+1

65-a=0.4+2+1

65-a=3.4

65-3.4=a

61.6=a

a=61.6