27x(13×5)+18x(59+14) tính nhanh Question 27x(13×5)+18x(59+14) tính nhanh in progress 0 Môn Toán Hưng Gia 4 years 2020-11-01T14:46:32+00:00 2020-11-01T14:46:32+00:00 2 Answers 84 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:
Bạn tham khảo nha
$27$ × ($13$ × $5$) + $18$ × ($59$ + $14$)
= $27$ × $65$ + $18$ × $73$
= $1755$ + $1314$
= $3069$
chúc bạn học tốt nha ^^