(1)计算:20+8-45+32(2)计算:|3-4|-22+12(3)239x+6x4(4)a28a+3a50a3.-数学

题目简介

(1)计算:20+8-45+32(2)计算:|3-4|-22+12(3)239x+6x4(4)a28a+3a50a3.-数学

题目详情

(1)计算:
20
+
8
-
45
+
32

(2)计算:|
3
-4|-22+
12

(3)
2
3
9x
+6
x
4

(4)a2
8a
+3a
50a3
题型:解答题难度:中档来源:不详

答案

(1)原式=2
5
+2
2
-3
5
+4
2

=6
2
-
5

(2)原式=4-
3
-4+2
3

=-
3
+2
3

=
3

(3)原式=class="stub"2
3
×3
x
+6×class="stub"1
2
x

=2
x
+3
x

=5
x

(4)原式=a2×2
2a
+3a×5a
2a

=2a2
2a
+15a2
2a

=17a2
2a

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