Tính thuận tiện 4/5 nhân 11/2 – 4/5 nhân 5/2 -2 nhân 4/5 12/10/2021 Bởi Eloise Tính thuận tiện 4/5 nhân 11/2 – 4/5 nhân 5/2 -2 nhân 4/5
$\dfrac{4}{5}\times$ $\dfrac{11}{2}$ $-\dfrac{4}{5}\times$ $\dfrac{5}{2}-$ $2\times$ $\dfrac{4}{5}$ $=\dfrac{4}{5}\times$ $(\dfrac{11}{2}-$ $\dfrac{5}{2}-2)$ $=\dfrac{4}{5}\times1$ $=\dfrac{4}{5}$ Bình luận
`4/5 times 11/2 – 4/5times 5/2 -2 times 4/5` `=4/5 times (11/2 – 5/2 -2 )` `=4/5 times (11/2 – 5/2 -4/2 )` `=4/5 times 1` `=4/5 ` Bình luận
$\dfrac{4}{5}\times$ $\dfrac{11}{2}$ $-\dfrac{4}{5}\times$ $\dfrac{5}{2}-$ $2\times$ $\dfrac{4}{5}$
$=\dfrac{4}{5}\times$ $(\dfrac{11}{2}-$ $\dfrac{5}{2}-2)$
$=\dfrac{4}{5}\times1$
$=\dfrac{4}{5}$
`4/5 times 11/2 – 4/5times 5/2 -2 times 4/5`
`=4/5 times (11/2 – 5/2 -2 )`
`=4/5 times (11/2 – 5/2 -4/2 )`
`=4/5 times 1`
`=4/5 `