1. 算一算。
$\frac {4}{9}×\frac {15}{16}÷\frac {5}{6}$ $\frac {35}{64}÷(\frac {1}{8}+\frac {3}{4})$ $24×(\frac {1}{8}+\frac {1}{3})$
$\frac {1}{16}×(15×\frac {4}{7})$ $\frac {2}{3}×13+\frac {1}{3}×13$ $\frac {7}{9}÷3-\frac {4}{27}$
$\frac {4}{9}×\frac {15}{16}÷\frac {5}{6}$ $\frac {35}{64}÷(\frac {1}{8}+\frac {3}{4})$ $24×(\frac {1}{8}+\frac {1}{3})$
$\frac {1}{16}×(15×\frac {4}{7})$ $\frac {2}{3}×13+\frac {1}{3}×13$ $\frac {7}{9}÷3-\frac {4}{27}$
答案:
$\frac{1}{2}$ $\frac{5}{8}$ 11 $\frac{15}{28}$ 13 $\frac{1}{9}$
2. 看图列式计算。
(1)

(2)

(1)
(2)
答案:
(1)$240× (1+\frac{1}{4})=300$(人)
(2)$420× (1+\frac{6}{7})=780$(万元)
(1)$240× (1+\frac{1}{4})=300$(人)
(2)$420× (1+\frac{6}{7})=780$(万元)
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