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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)×
3
2
÷(−
3
4
)×4;
(3)(
1
3
5
21
+
3
14
)×(−42);
(4)16−|−5|+2×(−
1
2
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].


(−2)×
3
2
÷(−
3
4
)×4;
(3)(
1
3
5
21
+
3
14
)×(−42);
(4)16−|−5|+2×(−
1
2
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
3
2
3322
3
4
3344
(
1
3
5
21
+
3
14
)×(−42);
(4)16−|−5|+2×(−
1
2
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
1
3
1133
5
21
552121
3
14
331414
16−|−5|+2×(−
1
2
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
16−|−5|+2×(−
1
2
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
16−|−5|+2×(−
1
2
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
6−|−5|+2×(−
1
2
)2;
(5)3(4x2-3x+2)-2(1-4x2+x);
(6)4y2-[3y-(3-2y)+2y2].
1
2
1122)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×
3
2
×(-
4
3
)×4=16;
(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
333222×(-
4
3
)×4=16;
(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
444333)×4=16;
(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
111222=-
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
111111222;
(5)原式=12x22-9x+6-2+84x22-2x=20x22-11x+4;
(6)原式=4y22-3y+3-2y-2y22=2y22-5y+3.