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计算(1)312+(-12)-(-13)+223(2)-82+3×(-2)2+(-6)÷(-13)2(3)412×[-9×(-13)2-0.8]÷(-514);(4)(512+23-34)×(-12)(5)-24-[(-3)2-(1-23×54)÷(-2)](6)(-96)×(-0.125)+96×18+
题目详情
计算
(1)3
+(-
)-(-
)+2
(2)-82+3×(-2)2+(-6)÷(-
)2
(3)4
×[-9×(-
)2-0.8]÷(-5
);
(4)(
+
-
)×(-12)
(5)-24-[(-3)2-(1-23×
)÷(-2)]
(6)(-96)×(-0.125)+96×
+(-96)×
(7)(3a-2)-3(a-5)
(8)(4a2b-5ab2)-(3a2b-4ab2)
(9)x-2[y+2x-(3x-y)]
(10)
m-2(m-
n2)-(
m-
n2).
(1)3
1 |
2 |
1 |
2 |
1 |
3 |
2 |
3 |
(2)-82+3×(-2)2+(-6)÷(-
1 |
3 |
(3)4
1 |
2 |
1 |
3 |
1 |
4 |
(4)(
5 |
12 |
2 |
3 |
3 |
4 |
(5)-24-[(-3)2-(1-23×
5 |
4 |
(6)(-96)×(-0.125)+96×
1 |
8 |
5 |
4 |
(7)(3a-2)-3(a-5)
(8)(4a2b-5ab2)-(3a2b-4ab2)
(9)x-2[y+2x-(3x-y)]
(10)
1 |
2 |
1 |
3 |
3 |
2 |
1 |
3 |
▼优质解答
答案和解析
(1)原式=3
-
+
+2
=3+3=6;
(2)原式=-64+3×4+(-6)÷
=-64+12+(-54)=-106;
(3)原式=
×(-9×
-0.8)÷(-
)=
×(-
)×(-
)=
;
(4)原式=
×(-12)=-4;
(5)原式=-16-[9-(1-8×
)÷(-2)]=-16-(9-
)=-25+
=-21
;
(6)原式=-96×(-
)+96×
-96×
=96×(
+
-
)=-96;
(7)原式=3a-2-3a+15=13;
(8)原式=4a2b-5ab2-3a2b+4ab2=a2b-ab2;
(9)原式=x-2(y+2x-3x+y)=x-2(2y-x)=3x-4y;
(10)原式=
m-2m+
n2-
m+
n2=-3m+n2;
1 |
2 |
1 |
2 |
1 |
3 |
2 |
3 |
(2)原式=-64+3×4+(-6)÷
1 |
9 |
(3)原式=
9 |
2 |
1 |
9 |
21 |
4 |
9 |
2 |
9 |
5 |
4 |
21 |
54 |
35 |
(4)原式=
4 |
12 |
(5)原式=-16-[9-(1-8×
5 |
4 |
9 |
2 |
9 |
2 |
1 |
2 |
(6)原式=-96×(-
1 |
8 |
1 |
8 |
5 |
4 |
1 |
8 |
1 |
8 |
5 |
4 |
(7)原式=3a-2-3a+15=13;
(8)原式=4a2b-5ab2-3a2b+4ab2=a2b-ab2;
(9)原式=x-2(y+2x-3x+y)=x-2(2y-x)=3x-4y;
(10)原式=
1 |
2 |
2 |
3 |
3 |
2 |
1 |
3 |
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