题目内容
口算.
(1)7.2+2.08=
(2)
+
=
(3)
÷
=
(4)0÷0.99=
(5)32×0.125=
(6)0.75×3÷
=
(7)
+3.2÷16×4=
(8)
-
×
=
(9)0.8÷0.01=
(10)10×
-1÷3=
(11)8.4÷0.7=
(12)
×5÷
×5
(13)0.23=
(1)7.2+2.08=
(2)
1 |
3 |
1 |
4 |
(3)
7 |
10 |
1 |
2 |
(4)0÷0.99=
(5)32×0.125=
(6)0.75×3÷
3 |
4 |
(7)
1 |
5 |
(8)
1 |
2 |
1 |
2 |
1 |
2 |
(9)0.8÷0.01=
(10)10×
1 |
3 |
(11)8.4÷0.7=
(12)
2 |
3 |
2 |
3 |
(13)0.23=
分析:根据小数加法、分数的四则混合运算和有理数的计算方法进行计算即可.
解答:解:(1)7.2+2.08=9.28,
(2)
+
=
,
(3)
÷
=1
,
(4)0÷0.99=0,
(5)32×0.125=4,
(6)0.75×3÷
=3,
(7)
+3.2÷16×4=1,
(8)
-
×
=
,
(9)0.8÷0.01=80,
(10)10×
-1÷3=3,
(11)8.4÷0.7=12
(12)
×5÷
×5=25,
(13)0.23=0.008.
(2)
1 |
3 |
1 |
4 |
7 |
12 |
(3)
7 |
10 |
1 |
2 |
2 |
5 |
(4)0÷0.99=0,
(5)32×0.125=4,
(6)0.75×3÷
3 |
4 |
(7)
1 |
5 |
(8)
1 |
2 |
1 |
2 |
1 |
2 |
1 |
4 |
(9)0.8÷0.01=80,
(10)10×
1 |
3 |
(11)8.4÷0.7=12
(12)
2 |
3 |
2 |
3 |
(13)0.23=0.008.
点评:此题主要考查的是小数加法、分数的四则混合运算和有理数的计算.
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