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一、口算。
$10÷0.5=$
$5.12+3.08=$
$8.19÷0.9=$
$0.36÷3.6=$
$0.45×0.5=$
$1.48+0.22=$
$\frac {25}{36}-\frac {4}{9}=$
$\frac {7}{8}+\frac {1}{3}=$
$10÷0.5=$
20
$4÷0.04=$100
$0.25×1.4=$0.35
$5.12+3.08=$
8.2
$8.02+2.16=$10.18
$3.2+2.88=$6.08
$8.19÷0.9=$
9.1
$4.8÷0.6=$8
$9.4-4.9=$4.5
$0.36÷3.6=$
0.1
$10-9.99=$0.01
$1.8×0.4=$0.72
$0.45×0.5=$
0.225
$7.2+0.28=$7.48
$0.2×0.15=$0.03
$1.48+0.22=$
1.7
$0.9×0.04=$0.036
$9.6÷0.48=$20
$\frac {25}{36}-\frac {4}{9}=$
$\frac{1}{4}$
$\frac {2}{5}+\frac {3}{10}=$$\frac{7}{10}$
$1-\frac {6}{13}=$$\frac{7}{13}$
$\frac {7}{8}+\frac {1}{3}=$
$\frac{29}{24}$
$\frac {3}{4}-\frac {2}{5}=$$\frac{7}{20}$
$\frac {2}{3}+\frac {1}{4}=$$\frac{11}{12}$
答案
一、20 100 0.35
8.2 10.18 6.08
9.1 8 4.5
0.1 0.01 0.72
0.225 7.48 0.03
1.7 0.036 20
$\frac{1}{4}$ $\frac{7}{10}$ $\frac{7}{13}$
$\frac{29}{24}$ $\frac{7}{20}$ $\frac{11}{12}$
8.2 10.18 6.08
9.1 8 4.5
0.1 0.01 0.72
0.225 7.48 0.03
1.7 0.036 20
$\frac{1}{4}$ $\frac{7}{10}$ $\frac{7}{13}$
$\frac{29}{24}$ $\frac{7}{20}$ $\frac{11}{12}$
二、计算长方体和正方体的体积。
答案
二、15×4.8=72(cm³)
25×5=125(cm³)
25×5=125(cm³)
