Clever calculation and speed arithmeticConverting decimals and fractionsMixed operations on decimals and fractions
Worked solution
1. 将带分数与小数统一转化为分数,变形原式
将除以带分数转化为乘以倒数:。
将小数转化为分数:。
原式变形为:
2. 提取公因数并计算括号内的数值
利用乘法分配律提取公因数 :
计算括号内的加减法:
3. 计算最终结果
Answer
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