2026年假日拾光长江少年儿童出版社五年级数学第50页答案
1. 用简便方法计算下面各题。
(1) $11\frac{1}{5} + 101\frac{1}{5} + 1001\frac{1}{5} + 10001\frac{1}{5}$
(2) $\frac{49}{5} + \frac{499}{5} + \frac{4999}{5} + \frac{3}{5}$

答案

(1)$11\frac{1}{5}+101\frac{1}{5}+1001\frac{1}{5}+10001\frac{1}{5}=10+100+1000+10000+1\frac{1}{5}+1\frac{1}{5}+1\frac{1}{5}+1\frac{1}{5}=11110+4\frac{4}{5}=11114\frac{4}{5}$
(2)$\frac{49}{5}+\frac{499}{5}+\frac{4999}{5}+\frac{3}{5}=10-\frac{1}{5}+100-\frac{1}{5}+1000-\frac{1}{5}+\frac{3}{5}=1110$