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1.把分数改写成小数，把小数改写成分数。(每题1★)
$\frac{13}{100}=$
$\frac{79}{100}=$
$\frac{7}{10}=$
$\frac{7}{100}=$
$\frac{7}{1000}=$
$0.32=$
$0.4=$
$0.009=$
$0.06=$
$0.64=$
$\frac{13}{100}=$
$\frac{79}{100}=$
$\frac{7}{10}=$
$\frac{7}{100}=$
$\frac{7}{1000}=$
$0.32=$
$0.4=$
$0.009=$
$0.06=$
$0.64=$
答案
1.$\frac{13}{100}=0.13$
$\frac{79}{100}=0.79$
$\frac{7}{10}=0.7$
$\frac{7}{100}=0.07$
$\frac{7}{1000}=0.007$
$0.32=\frac{32}{100}$
$0.4=\frac{4}{10}$
$0.009=\frac{9}{1000}$
$0.06=\frac{6}{100}$
$0.64=\frac{64}{100}$
$\frac{79}{100}=0.79$
$\frac{7}{10}=0.7$
$\frac{7}{100}=0.07$
$\frac{7}{1000}=0.007$
$0.32=\frac{32}{100}$
$0.4=\frac{4}{10}$
$0.009=\frac{9}{1000}$
$0.06=\frac{6}{100}$
$0.64=\frac{64}{100}$
2.化简下面的小数。(每题1★)
0.250=
2.5050=
1.000700=
18.00=
0.050=
100.0020=
5.60=
4.0080=
0.250=
2.5050=
1.000700=
18.00=
0.050=
100.0020=
5.60=
4.0080=
答案
2.
0.250=0.25
2.5050=2.505
1.000700=1.0007
18.00=18
0.050=0.05
100.0020=100.002
5.60=5.6
4.0080=4.008
0.250=0.25
2.5050=2.505
1.000700=1.0007
18.00=18
0.050=0.05
100.0020=100.002
5.60=5.6
4.0080=4.008
3.不改变数的大小，把下面各数改写成三位小数。(每题1★)
0.3=
3.14=
30.08=
6.1=
10.0100=
0.56=
15=
5.2000=
0.3=
3.14=
30.08=
6.1=
10.0100=
0.56=
15=
5.2000=
答案
3.
0.3=0.300
3.14=3.140
30.08=30.080
6.1=6.100
10.0100=10.010
0.56=0.560
15=15.000
5.2000=5.200
0.3=0.300
3.14=3.140
30.08=30.080
6.1=6.100
10.0100=10.010
0.56=0.560
15=15.000
5.2000=5.200
4.计算下面各题,怎样简便就怎样算。(每题4★)
543−168−132
137×101−137
157+268+143+232
20×125×5×8
36000÷2÷4÷25
270÷[(789−564)÷25]
543−168−132
137×101−137
157+268+143+232
20×125×5×8
36000÷2÷4÷25
270÷[(789−564)÷25]
答案
4.
543−168−132=243
137×101−137=13700
157+268+143+232=800
20×125×5×8=100000
36000÷2÷4÷25=180
270÷[(789−564)÷25]=30
543−168−132=243
137×101−137=13700
157+268+143+232=800
20×125×5×8=100000
36000÷2÷4÷25=180
270÷[(789−564)÷25]=30
