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1. 计算下面各题。（写出计算过程）
$\frac{8}{15}×25$
$3.6×\frac{10}{27}$
$\frac{34}{21}×\frac{14}{17}$
$\frac{8}{15}×25$
$3.6×\frac{10}{27}$
$\frac{34}{21}×\frac{14}{17}$
答案
$\frac{40}{3}$ $\frac{4}{3}$ $\frac{4}{3}$
2. 计算下面各题，能简算的要简算。
$\frac{3}{5}×\frac{2}{7}×\frac{5}{9}$
$\frac{5}{7}×\frac{9}{8}-\frac{1}{8}×\frac{5}{7}$
$48×\frac{6}{47}$
$\frac{3}{5}×\frac{2}{7}×\frac{5}{9}$
$\frac{5}{7}×\frac{9}{8}-\frac{1}{8}×\frac{5}{7}$
$48×\frac{6}{47}$
答案
$\frac{2}{21}$ $\frac{5}{7}$ $6\frac{6}{47}$
3. 看图列式计算。
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
答案
(1) $200 × \frac{3}{5} = 120(\mathrm{m})$
(2) $240 × \frac{6}{5} = 288(\mathrm{人})$
(3) $350 × (1 - \frac{1}{10}) = 315(\mathrm{元})$
(4) $1200 × (1 + \frac{1}{4}) = 1500(\mathrm{kg})$
(2) $240 × \frac{6}{5} = 288(\mathrm{人})$
(3) $350 × (1 - \frac{1}{10}) = 315(\mathrm{元})$
(4) $1200 × (1 + \frac{1}{4}) = 1500(\mathrm{kg})$
