更新1:
國中數學
急！求解 數學 (5 1/7 ÷0.4 -1 1/3 x4/5) ÷2.8?
回答 (1)
2020-08-22 1:39 pm
(5 1/7 ÷0.4 -1 1/3 x4/5) ÷2.8
= (36/7 ÷ 4/10 - 4/3 × 4/5) ÷ 28/10
= (36/7 × 10/4 - 16/15) × 10/28
= (90/7 - 16/15) × 10/28
= (1350/105 - 112/105) × 10/28
= 1238/105 × 10/28
= 619/147
= 4 31/147 (4 又 31/147)
= (36/7 ÷ 4/10 - 4/3 × 4/5) ÷ 28/10
= (36/7 × 10/4 - 16/15) × 10/28
= (90/7 - 16/15) × 10/28
= (1350/105 - 112/105) × 10/28
= 1238/105 × 10/28
= 619/147
= 4 31/147 (4 又 31/147)
收錄日期: 2021-05-04 02:33:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200822035745AAuyeJk