Tính A, 3/5 x 7/6 – 3/5 x 1/6 B, (5/7)2 – (2/3)3 +5/6 09/07/2021 Bởi Savannah Tính A, 3/5 x 7/6 – 3/5 x 1/6 B, (5/7)2 – (2/3)3 +5/6
Đáp án: Giải thích các bước giải: `a)3/5 × 7/6 – 3/5 × 1/6` `=3/5 × (7/6 – 1/6)` `=3/5 × 1` `=3/5` `b)(5/7)^2 – (2/3)^3 +5/6` `={25}/{49}-8/{27}+5/6` `={1350}/{2646}-{784}/{2646}+{2205}/{2646}` `={1350-784+2205}/{2646}` `={2771}/{2646}`. Bình luận
A, `3/5` x `7/6` – `3/5` x `1/6` = `3/5` (`7/6` – `1/6`) = `3/5` . 1 = `3/5` B, `(5/7)` . 2 – `(2/3)` . 3 +`5/6` = `10/7` – `6/3` + `5/6` = `10/7` – 2 + `5/6` = `11/42` XIN HAY NHẤT Ạ Bình luận
Đáp án:
Giải thích các bước giải:
`a)3/5 × 7/6 – 3/5 × 1/6`
`=3/5 × (7/6 – 1/6)`
`=3/5 × 1`
`=3/5`
`b)(5/7)^2 – (2/3)^3 +5/6`
`={25}/{49}-8/{27}+5/6`
`={1350}/{2646}-{784}/{2646}+{2205}/{2646}`
`={1350-784+2205}/{2646}`
`={2771}/{2646}`.
A, `3/5` x `7/6` – `3/5` x `1/6`
= `3/5` (`7/6` – `1/6`)
= `3/5` . 1
= `3/5`
B, `(5/7)` . 2 – `(2/3)` . 3 +`5/6`
= `10/7` – `6/3` + `5/6`
= `10/7` – 2 + `5/6`
= `11/42`
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