Tính hợp lý:1/ 103/23-9/14+58/23-5/4 2/ 67/27-7/15+95/27-8/15 26/08/2021 Bởi Delilah Tính hợp lý:1/ 103/23-9/14+58/23-5/4 2/ 67/27-7/15+95/27-8/15
Đáp án: `a)` `143/28` `b)` `5` Giải thích các bước giải: `a)` `103/23-9/14+58/23-5/4` `=(103/23+58/23)-(9/14+5/4)` `=7-53/28` `=143/28` `b)` `67/27-7/15+95/27-8/15` `=(67/27+95/27)-(7/15+8/15)` `=6-1` `=5` Bình luận
1, $\frac{103}{23}$ – $\frac{9}{14}$ + $\frac{58}{23}$ – $\frac{5}{4}$ = ($\frac{103}{23}$ + $\frac{58}{23}$) – ($\frac{9}{14}$ + $\frac{5}{4}$) = 7 – 1 = 6 2, $\frac{67}{27}$ – $\frac{7}{15}$ + $\frac{95}{27}$ – $\frac{8}{15}$ = ($\frac{67}{27}$ + $\frac{95}{27}$) + ($\frac{7}{15}$ + $\frac{8}{15}$) = 6 – 1 = 5 Bình luận
Đáp án:
`a)` `143/28`
`b)` `5`
Giải thích các bước giải:
`a)` `103/23-9/14+58/23-5/4`
`=(103/23+58/23)-(9/14+5/4)`
`=7-53/28`
`=143/28`
`b)` `67/27-7/15+95/27-8/15`
`=(67/27+95/27)-(7/15+8/15)`
`=6-1`
`=5`
1, $\frac{103}{23}$ – $\frac{9}{14}$ + $\frac{58}{23}$ – $\frac{5}{4}$ = ($\frac{103}{23}$ + $\frac{58}{23}$) – ($\frac{9}{14}$ + $\frac{5}{4}$) = 7 – 1 = 6
2, $\frac{67}{27}$ – $\frac{7}{15}$ + $\frac{95}{27}$ – $\frac{8}{15}$ = ($\frac{67}{27}$ + $\frac{95}{27}$) + ($\frac{7}{15}$ + $\frac{8}{15}$) = 6 – 1 = 5