Question

a) (423-c) : (671-111 x 3 x 2)=70
b) (1000- b x 2- 25 x 4) : 6=143
c) (e - 106 : 2 + 29 x 4) : 3 - 108 : 9 = 132
d) f:7 + 25 = [900 -(300- 48 x 5) x 9] :9

Answer 1

f:7+25=[900-(300-48×5)×9]:9
f:7+25=[900-(300-240)×9]:9
f:7+25=(900-60×9):9
f:7+25=(900-540):9
f:7+25=360:9
f:7+25=40
f:7=40-25
f:7=15
f=15×7
f=105