题目内容

口算:
12×0.6= 4.5÷
1
2
=
1
5
-
1
6
=
28×20%= 1.6×
3
4
=
3
7
=
36×
1
4
=
15÷
5
9
=
32= 0.12=
18.84÷3.14= 6.28÷3.14=
1
3
-
1
5
=
35×
1
7
=
1-4%=
7÷1.4= 1÷5%= 70%-60%= 80×125%= 2+53%=
分析:本题根据小数、分数、百分数的乘法、除法及减法的运算法则计算即可.
解答:解:
12×0.6=7.2, 4.5÷
1
2
=9,
1
5
-
1
6
=
1
30
28×20%=5.6, 1.6×
3
4
=1.2,
3
7
=
7
3
36×
1
4
=9,
15÷
5
9
=27,
32=9, 0.12=0.01,
18.84÷3.14=6, 6.28÷3.14=2,
1
3
-
1
5
=
2
15
35×
1
7
=5,
1-4%=96%,
7÷1.4=5, 1÷5%=20, 70%-60%=10%, 80×125%=100.
点评:完成此类题目要细心,在保证做题质量的同时,要注意提高做题的速度.
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