89÷135+58×23−0.625×3289 \div 1\frac{3}{5} + \frac{5}{8} \times 23 - 0.625 \times 32

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:89÷135=89÷85=89×5889 \div 1\frac{3}{5} = 89 \div \frac{8}{5} = 89 \times \frac{5}{8}。
将小数转化为分数:0.625=580.625 = \frac{5}{8}。
原式变形为:
89×58+58×23−58×3289 \times \frac{5}{8} + \frac{5}{8} \times 23 - \frac{5}{8} \times 32

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 58\frac{5}{8}:
=58×(89+23−32)= \frac{5}{8} \times (89 + 23 - 32)
计算括号内的加减法:
89+23−32=112−32=8089 + 23 - 32 = 112 - 32 = 80

3. 计算最终结果

=58×80=50= \frac{5}{8} \times 80 = 50

Answer

5050

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