- = | ÷ = | × = | × = | 10× = | × = |
÷ = | ÷ = | 15× = | ÷ = | + = | ÷22= |
- = , | ÷ = , | × = , | × = , | 10× =6, | × = , |
÷ = , | ÷ = , | 15× =12, | ÷ = , | + = , | ÷22= . |
分析:异分母分数加减法,先通分化成同分母分数再计算;分数乘法:分子相乘的积做分子,分母相乘电费积做分母;分数除法:除以一个数等于乘这个数的倒数;由此计算.
点评:本题考查了简单的分数计算,计算时要细心,把结果化成最简分数.
编辑:chaxungu时间:2026-04-27 12:11:20分类:小学数学题库
- = | ÷ = | × = | × = | 10× = | × = |
÷ = | ÷ = | 15× = | ÷ = | + = | ÷22= |
- = , | ÷ = , | × = , | × = , | 10× =6, | × = , |
÷ = , | ÷ = , | 15× =12, | ÷ = , | + = , | ÷22= . |
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