问题 解答题
计算:
(1)
2
×3
2

(2)5
x
×3
x3

(3)5
ab
•(-4
a3b
)(a≥0,b≥0)

(4)
a3b6
÷
ab
(a>0,b>0)

(5)
1
2
3
÷
2
1
3
×
1
2
5

(6)
2
b
ab5
•(-
3
2
a3b
)÷3
b
a
答案

(1)原式=2×3

=6;

(2)原式=15

x4

=15x2

(3)原式=-20

a4b2

=-20a2b;

(4)原式=

a2b5

=ab2

b

(5)原式=

5
3
÷
7
3
×
7
5

=1;

(6)原式=2b

ab
•(-
3
2
a
ab
)÷
3
ab
a

=-a2b

ab

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