Question

(9 : 2 + 4 x 1,25) x (2 x 1,05 - 6,4 + 4)

Answer 1

9:2 + 4 × 1,25 = (9:2) +:(4×1,25) =4,5+5=9,5

2×1,05-6,4:4=(2×1,05) - (6,4:4) = 2,1 - 1,6 =0,5

9,5×0,5 = 4,75