问题
解答题
计算: (1)
(2)
(3)
(4)
|
答案
(1)原式=
=2×32
=8;64
(2)原式=2
+33
-22
-42
=3
-22
;3
(3)原式=
÷10 3 2 5
×47 3
=1×7 5
×4×5 2
=10×
×10 3
×3 7 5 7
=5 2 7
;50 2 7
(4)原式=
-12(3+
)3 (3-
)(3+3
)3
=2(3+2- 3 (2+
)(2-3
)3
)-(2-3
)=6+23
-2+3
=4+33
.3