问题
解答题
计算: (1)π0+2-2×(2
(2)0.064-
(3)(
(4)
(5)
|
答案
(1)π0+2-2×(2
)1 4
=1+1 2
×1 4
=1+9 4
×1 4
=3 2
;11 8
(2)0.064-
-(-1 3
)0+161 8
+0.253 4
=1 2
-1+1 3 0.064
+4 163
=0.25
-1+8+0.5=10; 1 0.4
(3)(
)9 25
×(1 2
)-1+4×(1 10
)-8 27
=2 3
×10+4×9 25
=3 (
)227 8
×10+4×3 5
=15; 9 4
(4)
=a-4b2• 3 ab2
=a-4b2a
b1 3 2 3
=a-4+
b2+1 3 2 3
=a-a-
b11 3 8 3
b11 6
;4 3
(5)
=(a
b-1)-2 3
a1 2
b1 2 1 3 6 a•b5
=a-a-
b1 3
a1 2
b1 2 1 3 a
b1 6 5 6
+1 3
-1 2
b1 6
+1 2
-1 3
=a0b0=1.5 6