÷4= | 1÷ = | ÷3= | 14÷ = |
÷0.4= | ÷ = | × = | × = |
| 75%+0.25= | 1÷ ×1÷ = |
解: ÷4= , | 1÷ = , | ÷3= , | 14÷ =30, |
÷0.4=1, | ÷ =5, | × = , | × = , |
| 75%+0.25=1, | 1÷ ×1÷ = . |
分析:
÷0.4先把分数化成小数,然后再计算;75%+0.25把百分数化成小数,再计算;1÷
×1÷
按照从左到右的顺序的顺序计算;其它题目根据运算法则直接求解.点评:本题考查了学生通过约分对分数四则混合运题目进行简算的能力.
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