×16= | 12÷ = | 0.3× = | ÷ = |
1÷ = | × ÷ = | × ÷ × = | 0× + = |
- = | + = | × = | ÷ = |
解: ×16=12, | 12÷ =20, | 0.3× = , | ÷ = , |
1÷ = , | × ÷ = , | × ÷ × = , | 0× + = , |
- = , | + = , | × = , | ÷ = . |
分析:利用分数乘法:分子相乘的积做分子,分母相乘的积做分母;分数除法:除以一个数等于乘这个数的倒数进行计算即可.
点评:本题主要考查了分数乘除法的计算,计算时要细心,注意把结果化成最简分数.
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