27x(13×5)+18x(59+14) tính nhanh nha Question 27x(13×5)+18x(59+14) tính nhanh nha in progress 0 Môn Toán Farah 4 years 2020-11-03T03:47:35+00:00 2020-11-03T03:47:35+00:00 2 Answers 69 views 0
Answers ( )
` 27 × (13 × 5) + 18 × (59 + 14) `
` = 27 × 13 × 5 + 18 × 59 + 18 × 14 – 675 `
` = 135 × 18 + 18 × 59 + 18 × 14 – 675 `
` = 18 × (135 + 59 + 14) – 675 `
` = 18 × 208 – 675 `
` = 18 × 200 + 144 – 675 `
` = 3600 + 144 – 675 `
` = 3069 `
Đáp án:
Giải thích các bước giải:
`27 × ( 13 × 5 ) + 18 × ( 59 + 14 )`
`= 27 × 65 + 18 × 73`
`= 1755 + 1314`
`= 3069`