Simplify 7.2×0.095/0.0019×18?
回答 (2)
2016-02-11 12:00 pm
7.2 = 72 × 0.1 = 18 × 4 × 0.1
0.095 = 95 × 0.001 = 19 × 5 × 0.001
0.0019 = 19 × 0.0001
7.2 × 0.095 / [0.0019 × 18]
= (18 × 4 × 0.1) × (19 × 5 × 0.001) / [(19 × 0.0001) × 18]
= (18 × 19) × (4 × 5) × (0.1 × 0.001) / [(19 × 18) × 0.0001)]
= 20 × 0.0001 / 0.0001
= 20
0.095 = 95 × 0.001 = 19 × 5 × 0.001
0.0019 = 19 × 0.0001
7.2 × 0.095 / [0.0019 × 18]
= (18 × 4 × 0.1) × (19 × 5 × 0.001) / [(19 × 0.0001) × 18]
= (18 × 19) × (4 × 5) × (0.1 × 0.001) / [(19 × 18) × 0.0001)]
= 20 × 0.0001 / 0.0001
= 20
2016-02-11 2:01 pm
7.2 × 0.095 / 0.0019 × 18
= 7.2 × 50 × 18
= 360 × 18
= 3,600 + 2,400 + 480
= 6,480
= 7.2 × 50 × 18
= 360 × 18
= 3,600 + 2,400 + 480
= 6,480
收錄日期: 2021-04-20 16:15:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160211035157AAw9ATm