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计算或化简:(1)-3+5.3+7-5.3;(2)(−2)×32÷(−34)×4;(3)(13−521+314)×(−42);(4)−16−|−5|+2×(−12)2;(5)3(4x2-3x+2)-2(1-4x2+x);(6)4y2-[3y-(3-2y)+2y2].
题目详情
计算或化简:
(1)-3+5.3+7-5.3;
(2)(−2)×
÷(−
)×4;
(3)(
−
+
)×(−42);
(4)−16−|−5|+2×(−
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
(−2)×
÷(−
)×4;
(3)(
−
+
)×(−42);
(4)−16−|−5|+2×(−
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
3 3 2 2
3 3 4 4
(
−
+
)×(−42);
(4)−16−|−5|+2×(−
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
1 1 3 3
5 5 21 21
3 3 14 14
−16−|−5|+2×(−
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].16−|−5|+2×(−
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].16−|−5|+2×(−
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].6−|−5|+2×(−
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
1 1 2 2 )2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
22
22
(1)-3+5.3+7-5.3;
(2)(−2)×
| 3 |
| 2 |
| 3 |
| 4 |
(3)(
| 1 |
| 3 |
| 5 |
| 21 |
| 3 |
| 14 |
(4)−16−|−5|+2×(−
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
(−2)×
| 3 |
| 2 |
| 3 |
| 4 |
(3)(
| 1 |
| 3 |
| 5 |
| 21 |
| 3 |
| 14 |
(4)−16−|−5|+2×(−
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
| 3 |
| 2 |
| 3 |
| 4 |
(
| 1 |
| 3 |
| 5 |
| 21 |
| 3 |
| 14 |
(4)−16−|−5|+2×(−
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
| 1 |
| 3 |
| 5 |
| 21 |
| 3 |
| 14 |
−16−|−5|+2×(−
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].16−|−5|+2×(−
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].16−|−5|+2×(−
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].6−|−5|+2×(−
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
| 1 |
| 2 |
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
22
22
▼优质解答
答案和解析
(1)原式=-8.3+12.3=4;
(2)原式=-2×
×(-
)×4=16;
(3)原式=-14+10-9=-13;
(4)原式=-1-5+
=-
;
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
3 3 32 2 2×(-
)×4=16;
(3)原式=-14+10-9=-13;
(4)原式=-1-5+
=-
;
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
4 4 43 3 3)×4=16;
(3)原式=-14+10-9=-13;
(4)原式=-1-5+
=-
;
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
1 1 12 2 2=-
;
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
11 11 112 2 2;
(5)原式=12x22-9x+6-2+84x22-2x=20x22-11x+4;
(6)原式=4y22-3y+3-2y-2y22=2y22-5y+3.
(2)原式=-2×
| 3 |
| 2 |
| 4 |
| 3 |
(3)原式=-14+10-9=-13;
(4)原式=-1-5+
| 1 |
| 2 |
| 11 |
| 2 |
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
| 3 |
| 2 |
| 4 |
| 3 |
(3)原式=-14+10-9=-13;
(4)原式=-1-5+
| 1 |
| 2 |
| 11 |
| 2 |
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
| 4 |
| 3 |
(3)原式=-14+10-9=-13;
(4)原式=-1-5+
| 1 |
| 2 |
| 11 |
| 2 |
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
| 1 |
| 2 |
| 11 |
| 2 |
(5)原式=12x2-9x+6-2+84x2-2x=20x2-11x+4;
(6)原式=4y2-3y+3-2y-2y2=2y2-5y+3.
| 11 |
| 2 |
(5)原式=12x22-9x+6-2+84x22-2x=20x22-11x+4;
(6)原式=4y22-3y+3-2y-2y22=2y22-5y+3.
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