问题
解答题
计算: (1)
(2)5
(3)5
(4)
(5)
(6)
|
答案
(1)原式=2×3
=6;
(2)原式=15x4
=15x2;
(3)原式=-20a4b2
=-20a2b;
(4)原式=a2b5
=ab2
;b
(5)原式=
÷5 3
×7 3 7 5
=1;
(6)原式=2b
•(-ab
a3 2
)÷ab 3 ab a
=-a2b
.ab
计算: (1)
(2)5
(3)5
(4)
(5)
(6)
|
(1)原式=2×3
=6;
(2)原式=15x4
=15x2;
(3)原式=-20a4b2
=-20a2b;
(4)原式=a2b5
=ab2
;b
(5)原式=
÷5 3
×7 3 7 5
=1;
(6)原式=2b
•(-ab
a3 2
)÷ab 3 ab a
=-a2b
.ab