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一、口算。
$40×70\% =$
$10÷\frac {5}{6}=$
$\frac {3}{8}-\frac {3}{11}=$
$20×73\% =$
$\frac {1}{3}+\frac {4}{21}=$
$\frac {3}{4}+\frac {3}{7}=$
$1÷40\% =$
$40×70\% =$
28
$0.8^{2}=$0.64
$3÷30\% =$10
$10÷\frac {5}{6}=$
12
$\frac {12}{7}×25\% =$$\dfrac{3}{7}$
$14.4÷0.16=$90
$\frac {3}{8}-\frac {3}{11}=$
$\dfrac{9}{88}$
$34×\frac {2}{51}=$$\dfrac{4}{3}$
$9÷0.25=$36
$20×73\% =$
14.6
$216-106=$110
$\frac {5}{12}÷\frac {5}{8}=$$\dfrac{2}{3}$
$\frac {1}{3}+\frac {4}{21}=$
$\dfrac{11}{21}$
$0.25×40=$10
$\frac {3}{5}-\frac {3}{20}=$$\dfrac{9}{20}$
$\frac {3}{4}+\frac {3}{7}=$
$\dfrac{33}{28}$
$\frac {1}{2}-0.5=$0
$\frac {2}{21}×\frac {7}{8}=$$\dfrac{1}{12}$
$1÷40\% =$
2.5
$\frac {5}{6}÷\frac {5}{18}=$3
$117.5\% -1.5\% =$116%
答案
28 0.64 10
12 $\dfrac{3}{7}$ 90
$\dfrac{9}{88}$ $\dfrac{4}{3}$ 36
14.6 110 $\dfrac{2}{3}$
$\dfrac{11}{21}$ 10 $\dfrac{9}{20}$
$\dfrac{33}{28}$ 0 $\dfrac{1}{12}$
2.5 3 116%
12 $\dfrac{3}{7}$ 90
$\dfrac{9}{88}$ $\dfrac{4}{3}$ 36
14.6 110 $\dfrac{2}{3}$
$\dfrac{11}{21}$ 10 $\dfrac{9}{20}$
$\dfrac{33}{28}$ 0 $\dfrac{1}{12}$
2.5 3 116%
二、计算下面各题，怎样简便就怎样计算。
$\frac {7}{10}×99+70\%$ $17.68÷5.2+3.7×1.5$ $21÷(\frac {1}{3}+\frac {2}{5})÷\frac {9}{11}$
$\frac {2025}{2026}÷\frac {1}{2025}$ $46÷(0.3+0.5)÷23$ $17×15×(\frac {7}{15}-\frac {5}{34})$
$\frac {7}{10}×99+70\%$ $17.68÷5.2+3.7×1.5$ $21÷(\frac {1}{3}+\frac {2}{5})÷\frac {9}{11}$
$\frac {2025}{2026}÷\frac {1}{2025}$ $46÷(0.3+0.5)÷23$ $17×15×(\frac {7}{15}-\frac {5}{34})$
答案
70 8.95 35
2024 $\dfrac{1}{2026}$ 2.5 81 $\dfrac{1}{2}$
2024 $\dfrac{1}{2026}$ 2.5 81 $\dfrac{1}{2}$
