一、口算。
$11.5÷5\% =$
$\frac {3}{5}+\frac {12}{5}=$
$65.5÷0.5=$
$\frac {7}{8}-\frac {5}{6}=$
$0×\frac {5}{11}=$
$6.8÷0.4=$
$275÷2.5=$
$\frac {7}{8}×\frac {20}{21}=$
$4.8÷80=$
$1-0.72=$
$11.5÷5\% =$
230
$\frac {5}{8}-\frac {5}{9}=$$\dfrac{5}{72}$
$\frac {1}{2}+\frac {1}{3}+\frac {1}{6}=$1
$\frac {3}{5}+\frac {12}{5}=$
3
$4.5×0.4=$1.8
$(\frac {4}{7}+\frac {4}{7})÷\frac {4}{7}=$2
$65.5÷0.5=$
131
$6.75-0.07=$6.68
$\frac {1}{4}×\frac {8}{5}×8=$$\dfrac{16}{5}$
$\frac {7}{8}-\frac {5}{6}=$
$\dfrac{1}{24}$
$\frac {3}{26}×\frac {13}{18}=$$\dfrac{1}{12}$
$5.5+(8.2-4.5)=$9.2
$0×\frac {5}{11}=$
0
$\frac {4}{5}÷\frac {16}{15}=$$\dfrac{3}{4}$
$24÷(\frac {8}{5}×\frac {1}{3})=$45
$6.8÷0.4=$
17
$\frac {1}{5}+\frac {3}{8}=$$\dfrac{23}{40}$
$(2.7+5.3)×0.5=$4
$275÷2.5=$
110
$1.05×0.8=$0.84
$2.9×0.25×4=$2.9
$\frac {7}{8}×\frac {20}{21}=$
$\dfrac{5}{6}$
$7.3+13.7=$21
$3.6÷8÷0.25=$1.8
$4.8÷80=$
0.06
$\frac {9}{40}÷\frac {3}{20}=$$\dfrac{3}{2}$
$2.8-(0.75-0.25)=$2.3
$1-0.72=$
0.28
$0.3+\frac {9}{10}=$1.2
$15×\frac {9}{10}÷60\% =$$\dfrac{45}{2}$
答案
一、230 $\dfrac{5}{72}$ 1
3 1.8 2
131 6.68 $\dfrac{16}{5}$
$\dfrac{1}{24}$ $\dfrac{1}{12}$ 9.2
0 $\dfrac{3}{4}$ 45
17 $\dfrac{23}{40}$ 4
110 0.84 2.9
$\dfrac{5}{6}$ 21 1.8
0.06 $\dfrac{3}{2}$ 2.3
0.28 1.2 $\dfrac{45}{2}$
3 1.8 2
131 6.68 $\dfrac{16}{5}$
$\dfrac{1}{24}$ $\dfrac{1}{12}$ 9.2
0 $\dfrac{3}{4}$ 45
17 $\dfrac{23}{40}$ 4
110 0.84 2.9
$\dfrac{5}{6}$ 21 1.8
0.06 $\dfrac{3}{2}$ 2.3
0.28 1.2 $\dfrac{45}{2}$
二、填表。

1:2000000
3
690
答案
二、1:2000000 3 690
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