计算:(1)2×(-5)+22-3÷12 .
- 教育综合
- 2023-12-02 17:44:40
(1)2×(-5)+2 3 -3÷12;(2)1 1 2 ×[3× (- 2 3 ) 2 -1]- 1 3
(1)原式=-10+8-4 =-6; (2)原式=
=
=
=
=
(3)x-
6x-3(x-1)=12-2(x+2) 6x-3x+3=12-2x-4 6x-3x+2x=12-4-3 5x=5 x=1; (4)
x-
6x-2x+2=18x+9 6x-2x-18x=9-2 -14x=7 x=-
|
计算(1)2×(-3)+22-3÷12(2)[(-1)2013-(34-16-38)×24]÷|-32+5
(1)2×(-3)+22-3÷
1 |
2 |
=-6+4-6
=-8;
(2)[(-1)2013-(
3 |
4 |
1 |
6 |
3 |
8 |
=[(-1)-(18-4-9)]÷27
=[(-1)-5]÷27
=-6÷27
=-
2 |
9 |
计算:(1)16+(-14)+(-16)-(-4);(2)(512+23?34)×(?12);(3)2×(?5)+22?3÷12;(4)?22+60
(1)原式=16-14-16+4
=16-16-14+4
=-10;
(2)原式=
5 |
12 |
2 |
3 |
3 |
4 |
=-5-8+9
=-13+9
=-4;
(3)原式=-10+4-3×2
=-10+4-6
=-12;
(4)原式=-4+10×(-
1 |
6 |
=-4-
5 |
3 |
=-
17 |
3 |
(5)原式=0.25×(-8)-[4×
9 |
4 |
=-2-[9+1]
=-2-10
=-12.
计算:(1)(-2)2×5-(-2)3÷4(2)-12-(3-5)+32×(1-3
(1)原式=4×5-(-8)÷4=20+2=22;
(2)原式=-1-(-2)+9×(-2)
=-1+2-18
=-19+2
=-17.
计算:(1)23×5-(-113)×5+(-1)×5;(2)-22-32×2+(-2)3÷(-12)
(1)原式=(
2 |
3 |
1 |
3 |
=1×5
=5;
(2)原式=-4-3+(-8)×(-2)
=-4-3+16
=9.
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