7.8×5÷7.8×5用简便方法计算

2025-01-19 13:06:52
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回答1:

7/2×5/8-3/2÷8/5的简便计算 7/2×5/8-3/2÷8/5 =7/2×5/8-3/2×5/8 =(7/2-3/2)×5/8 =2×5/8 =5/4=1.25