7.5×2+1.25÷0.5 98×4.7 9.2÷0.25+0.75 简便计算
答案:1 悬赏:60 手机版
解决时间 2021-02-27 14:20
- 提问者网友：鐵馬踏冰河
- 2021-02-27 09:37
7.5×2+1.25÷0.5 98×4.7 9.2÷0.25+0.75 简便计算
最佳答案
- 五星知识达人网友：轻雾山林
- 2021-02-27 10:46
7.5×2+1.25÷0.5
=15-2.5
=12.5
98×4.7
=(100-2)×4.7
=470-9.4
=460.6
9.2÷0.25+0.75
=9.2×4+0.75
=36.8+0.75
=37.55追问弟一题不是简便。追答7.5×2+1.25÷0.5
=7.5×2+1.25×2
=(7.5+1.25)×2
=8.75×2
=17.5
=15-2.5
=12.5
98×4.7
=(100-2)×4.7
=470-9.4
=460.6
9.2÷0.25+0.75
=9.2×4+0.75
=36.8+0.75
=37.55追问弟一题不是简便。追答7.5×2+1.25÷0.5
=7.5×2+1.25×2
=(7.5+1.25)×2
=8.75×2
=17.5
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