问题
解答题
(1)计算:3
(2)计算:(2
(3)
(4)(
(5)
(6)(
(7)
(8)5-
|
答案
(1)原式=3
;7
(2)原式=(2
-2
+27 8
+2
)(27 8
-2
-27 8
-2
)=47 8
×(-2
)=-77 4
;2
(3)原式=-
=-3+19
=4;16
(4)原式=
×1 5
×5 3
=3 25
=
×1 5
×5 3 3 25
;1 5
(5)原式=4
×2×22 6
÷21 2
=21 6
×2×22 3
÷21 2
=21 6
+1+2 3
-1 2
=22=4;1 6
(6)原式=
-26×3
-315×3
=32
-62
-35
=-62
;5
(7)原式=
×2
×3
+2
=29+7
+4;3
(8)原式=5-
+1 2
+(1 2
) 3 2
=50+3 2
=1+3 3 2 2 3 2
.3 3 2 2 3 2