Question

b) 27 . 58 + 42 .27 d) 68 . 18 + 39 . 18 – 18 . 7

Answer 1

b) = 27.(58+42)

    = 27.100=2700

d) =18.(68+39-7)

    =18.100=1800

Answer 2

`b)`

`27.58 + 42.27`

`=27.(58+42)`

`=27.100`

`=2700`

`d)`

`68.18+39.18-18.7`

`=18.(68 + 39-7)`

`=18.100`

`=1800`

Áp dụng  : `a.d + b.d = d.(a+d)`

Answer 3

b) 27.58+42.27=27.(58+42)=27.100=2700

d)68.18+39.18-18.7=18.(68+39-7)=18.100=1800