Question

Tính bàng cách thuận tiên
a) 45 x 2 x 0,5 x 4
b) 0,86 x 8 x 15 x 1,25
c) 7,3 x 6,17 + 7,3 x 3,9
d) 6,15 x \(\dfrac{3}{4}\) + \(\dfrac{1}{4}\) x 6,15

Answer 1

`a)=45xx4xx2xx0,5`

`=180xx1=180`

`b)0,86xx8xx15xx1,25`

`=0,86xx15xx8xx1,25`

`=12,9xx10=129`

`c)=7,3xx(6,17+3,9)`

`=7,3xx10,07=73,511`

`d)=6,15xx(3/4+1/4)`

`=6,15xx1=6,15`