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计算(1)(-12)-(-15)+(-8)-(-10)(2)(16...

(1)(-12)-(-15)+(-8)-(-10)=(-12)+15+(-8)+10=-20+25=5;(2)(16+136-14+112)×(-48)=16×(-48)+136×(-48)-14×(-48)+112×(-48)=-8+(-43)+12+(-4)=12+(-1313)=-113;(3)-7-4×(-3)+12÷(-4)=-7+12+(-3)=-10...

①(-8)-(-1),=-8+1,=-7;②8+(-10)+(-2)-(-5),=8-10-2+5,=8+5-10-2,=1;③392324×(-12),=(40-124)×(-12),=-40×12+12,=-47912;④-24×(-12+34-13),=24×12-24×34+24×13,=12-18+8,=2;⑤8×(-45)÷|-16|,=-8×45×116,=-25;⑥-...

(1)原式=-15+8-11-12=-30;(2)原式=-72×(-13)×314×(-2)=-12;(3)原式=4+36-8=32;(4)原式=-8+(16+8×3)=-8+40=32;(5)原式=-13ab-12a2+13a2+23ab=13ab-16a2;(6)原式=4x2-(32x-12x+3+3x2)=4x2-32x+12x-3-3x2=x2-x-3.

(1)原式=30÷(-130),=30×(-30),=-900;(2)原式=8+9×(-2),=8-18,=-10;(3)原式=-2+89-2,=-319;(4)原式=-9×19+8×4,=-1+32,=31.

#include#includemain(){int n=0;double sum=1,k=-0.5,t=1,m;while(fabs(t)>0.0001){t=t*k;m=t;sum=sum+m;n++;}printf("n=%d ,sum=%lf\n",n,sum);}

①26+(-14)+(-16)+8=(26+8)+(-30)=34-30=4②(-5.5)+(-3.2)-(-2.5)-4.8=-5.5-3.2+2.5-4.8=-8.7+2.5-4.8=-6.2-4.8=-11 ③12(x-1)=2-15(x+2) 0.5x-0.5=2-0.2x-0.40.5x-0.5+0.5=2-0.2x+0.5-0.4 0.5x=2.1-0.2x 0.5x+0.2x=2.1+0.2x-0.2...

(1)10÷8+3.96×12.5%+2.04× 2 16 =1.25+3.96×12.5%+2.04×0.125,=0.125×10+3.96×0.125+2.04×0.125,=(10+3.96+2.04)×0.125,=16×0.125,=2;(2)6000-105×36=6000-(100+5)×36,=6000-100×36-36×5,=6000-3600-180,=2220;(3)85-84 7 8...

(1)原式=-10+32-12=-22+32=10;(2)原式=-1-16×(2-9)=-1+76=16;(3)原式=6a2b-5ab2-6a2b+8ab2=2a2b+3ab2;(4)原式=3a2+6a2+3a+12a2-3a=192a2.

(1)原式=23-17+7-16=30-33=-3;(2)原式=-1×(-8+9)=-1×1=-1;(3)原式=8+9×(-2)=8-18=-10;(4)原式=8×94-3=18-3=15.

(1)25×12-850÷17=25×4×3-50,=300-50,=250;(2)(3.2÷16+10.8)÷22=(0.2+10.8)÷22,=11÷22,=0.5;(3)3.2×12.5×2.5=0.8×4×12.5×2.5,=(12.5×0.8)×(2.5×4),=10×10,=100;(4)7.05-3.84-0.16-1.05=7.05-1.05-(3.84+0.16),=6-4...

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