问题
解答题
计算: (1)
(2)
(3)-
(4)(-7
(5)
(6)
(7)4
(8)
(9)
(10)(4+
(11)(
(12)(
(13)(5
(14)
|
答案
(1)原式=
=144×169
× 144
=12×13=156.169
(2)原式=3m
.2n
(3)原式=-
×15=-5.1 3
(4)原式=49×
=3 14
.21 2
(5)原式=
× 2 3
×(-2715 4
)=-5
×2 3
×2715 2
=-455
.5
(6)原式=3
-2
+ 2
=23
+ 2
.3
(7)原式=4
+3 5
-2 5
+42
=72
+25
.2
(8)原式=
•32x 3
+12x•2x
-x2•2x 4
=2x2x x
+3x2x
-x2x
=4x2x
.2x
(9)原式=3
×43
÷ 2
=12.6
(10)原式=42-(
)2=16-3=13.3
(11)原式=4+2
-23
=4.3
(12)原式=(
+3
)×2(5
-3
)=2(3-5)=-4.5
(13)原式=(20
-183
+43
)÷15
=20-18+43
=2+45
.5
(14)原式=
+1+33
-1=43
.3