2 và 3/5 – 1 và 1/3 x 9/8 + 7/15 60/75 x 25% : 3/5 – 2/15 ( 3/4 + 1/2 : 2/3 ) x 0,4 – 3/10 17/07/2021 Bởi Emery 2 và 3/5 – 1 và 1/3 x 9/8 + 7/15 60/75 x 25% : 3/5 – 2/15 ( 3/4 + 1/2 : 2/3 ) x 0,4 – 3/10
Đáp án: `a,` `2 3/5 – 1 1/3 × 9/8 + 7/15` `= 13/5 – 4/3 × 9/8 + 7/15` `= 13/5 – 3/2 + 7/15` `= 11/10 + 7/15` `= 47/30` `b,` `60/75 × 25% ÷ 3/5 – 2/15` `= 1/5 ÷ 3/5 – 2/15` `= 1/3 – 2/15` `= 1/5` `c,` `(3/4 + 1/2 ÷ 2/3) × 0,4 – 3/10` `= (3/4 + 3/4) × 0,4 – 3/10` `= 3/2 × 0,4 – 3/10` `= 3/5 – 3/10` `= 3/10` Bình luận
Xin ctrlhn ạ
Đáp án:
`a,`
`2 3/5 – 1 1/3 × 9/8 + 7/15`
`= 13/5 – 4/3 × 9/8 + 7/15`
`= 13/5 – 3/2 + 7/15`
`= 11/10 + 7/15`
`= 47/30`
`b,`
`60/75 × 25% ÷ 3/5 – 2/15`
`= 1/5 ÷ 3/5 – 2/15`
`= 1/3 – 2/15`
`= 1/5`
`c,`
`(3/4 + 1/2 ÷ 2/3) × 0,4 – 3/10`
`= (3/4 + 3/4) × 0,4 – 3/10`
`= 3/2 × 0,4 – 3/10`
`= 3/5 – 3/10`
`= 3/10`