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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)原式=12+(-14)+56+(-27),=12+56+(-14)+(-27),=68+(-41),=27;(2)原式=(-3.2)+8.1+(-16.9)+(-1 2 15 ),=(-3.2)+(-16.9)+8.1+(-1 2 15 ),=-12+(-1 2 15 ),=-13 2 15 ;(3)原式=3 2 5 +(-2 7 8 )+(-3 5...

(1)解:原式=-7+10-8-2=-7+(10-8-2)=-7;(2)解:原式=-99-(-3)=-99+3=-96;(3)解:原式=14×12?12×12+16×12=3-6+2 =-1;(4)解:原式=?1?16×[2?9]=?1?16×(?7)=?1?(?76)=?1+76=16.

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=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.

(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)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...

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)原式=-10+16-24=-34+16=-18;(2)原式=76×(-15)×314×53=-112;(3)原式=-(200-27)×14=-2800+4=-2796;(4)原式=17×165+56×165+136×165=(17+56+136)×165=20×165=64.

(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.

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