计算:(1)(-144)×(-169)(2)18m2n(m>0)(3)-13225(4)(-7314)2(5)23334×(-945)(6)18-22+3(7)45+45-8+42(8)2x318x+

题目简介

计算:(1)(-144)×(-169)(2)18m2n(m>0)(3)-13225(4)(-7314)2(5)23334×(-945)(6)18-22+3(7)45+45-8+42(8)2x318x+

题目详情

计算:
(1)
(-144)×(-169)

(2)
18m2n
(m>0)
(3)-
1
3
225

(4)(-7
3
14
)2

(5)
2
3
3
3
4
×(-9
45
)

(6)
18
-
2
2
+
3

(7)4
5
+
45
-
8
+4
2

(8)
2x
3
18x
+12x
x
8
-x2
2
x

(9)
27
×
32
÷
6

(10)(4+
3
)(4-
3

(11)(
3
+1)2-2
3

(12)(
3
+
5
)(2
3
-2
5
)

(13)(5
48
-6
27
+4
15
3

(14)
2
3
-1
+
27
-(
3
-1)0
题型:解答题难度:中档来源:不详

答案

(1)原式=
144×169
=
144
 × 
169
=12×13=156.
(2)原式=3m 
2n

(3)原式=-class="stub"1
3
×15=-5.
(4)原式=49×class="stub"3
14
=class="stub"21
2

(5)原式=class="stub"2
3
 × 
class="stub"15
4
 ×
(-27
5
)=-class="stub"2
3
×
15
2
×27
5
=-45
5

(6)原式=3
2
-
2
3
=2
2
3

(7)原式=4
5
+3 
5
-2 
2
+4
2
=7
5
+2
2

(8)原式=class="stub"2x
3
•3
2x
+12x•
2x
4
-x2•
2x
x
=2x
2x
+3x
2x
-x
2x
=4x
2x

(9)原式=3
3
×4
2
÷ 
6
=12.
(10)原式=42-(
3
)2=16-3=13.
(11)原式=4+2
3
-2
3
=4.
(12)原式=(
3
+
5
)×2(
3
-
5
)=2(3-5)=-4.
(13)原式=(20
3
-18
3
+4
15
)÷
3
=20-18+4
5
=2+4
5

(14)原式=
3
+1+3
3
-1=4
3

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