精英家教网 > 小学数学 > 题目详情
口算
5
6
×
9
10
=

24
19
÷8=

0.375×
4
9
=

4.2+
3
5
=

24÷
3
8
=
3×3×3= 63×10%= 1.5×0.4= 3.14×6= 0.18÷3=
分析:根据分数乘除法的计算法则和小数乘除法的计算法则求解.
解答:解:
5
6
×
9
10
=
3
4

24
19
÷8=
3
19

0.375×
4
9
=
1
6

4.2+
3
5
=4.8,

24÷
3
8
=64,
3×3×3=27, 63×10%=6.3, 1.5×0.4=0.6, 3.14×6=18.84, 0.18÷3=0.06.
点评:分数的计算要注意把结果化成最简分数;小数的计算要注意小数点的位置.
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