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脱式计算(1)6760÷13+17×25(2)4.82%5.2÷0.8×0.6...

(1)6760÷13+17×25,=520+17×25,=520+425,=945;(2)4.82-5.2÷0.8×0.6,=4.82-6.5×0.6,=4.82-3.9,=0.92;(3) 5 6 - 3 4 ÷ 3 10 ,= 5 6 - 5 2 ,=- 5 3 ;(4)35÷ 7 8 ×1- 2 7 ,=40×1- 2 7 ,=40- 2 7 ,=39 5 7 .

(1)6760÷13+17×25,=520+425,=945;(2)4.82-5.2÷0.8×0.6,=4.82-3.9,=0.92;(3)35÷ 7 8 ×(1- 3 8 ),=35× 8 7 × 5 8 ,=25;(4) 9 5 ÷[( 1 2 - 1 3 )× 4 15 ],= 9 5 ÷[ 1 6 × 4 15 ],= 9 5 ÷ 2 45 ,= 9 5 × 45 2 ,= 81 2 .

(1)6760÷13+17×25,=520+425,=945;(2)4.82-5.2÷0.8×0.6,=4.82-6.5×0.6,=4.82-3.9,=0.92;(3)35÷78×1-27=40×1-27,=40-27,=3957.

(1)6760÷13+17×25,=520+425,=945;(2)4.82-5.2÷0.8×0.6,=4.82-6.5×0.6,=4.82-3.9,=0.92;(3)(712?12)÷1124,=(712?12)×2411,=712×2411-12×2411,=1411?1211,=211;(4)(13+12)÷(2?23),=56÷113,=58;(5)(56?58×45)÷13,=(...

(1)原式=34×8-34×23+34×13=6-12+14=534;(2)原式=0;(3)原式=-1-16×(-8+9)=-1-16=-116;(4)原式=32×4-73×(-27)=6+63=69.

(1)14-7.2-2.8 =14-(7.2+2.8)=14-10=4; (2)5.5×17.3+6.6×5.5+0.1×5.5=5.5×(17.3+6.6+0.1)=5.5×24=132;(3)13.7÷12.5÷0.8=13.7÷(12.5×0.8)=13.7÷10=1.37.

(1)原式=(8+5)+(-6-7)=13-13=0;(2)原式=17+4-12=9;(3)原式=-27-3+54=42;(4)原式=-1-12×13(2-9)=-1+76=16.

12.75-5/17+1/4 =12.75+0.25-5/17 =13-5/17 =12又12/17 , 1.3x1/4-0.5x25%-0.2÷4 =1.3x1/4-0.5x1/4-0.2x1/4 =(1.3-0.5-0.2)x1/4 =0.6x1/4 =0.15 , 7分之6×15分之13×65分之7 =6/7x(13/15x7/65) =6/7x7/75 =2/25 , 86.48÷{(3.45+4.65)×0....

6.4+7.3=13.78.6-1.4=7.219.2+0.8=201-0.9=0.169÷3=23427÷7=612400÷8=300510÷5=10230×18=54015×20=30030×60=180017×40=68050×20=100090×70=630012×50=60070×100=7000

(1)18×58+42÷8,=294+214,=252;(2)[45-0÷(13+25)]×58,=[45-0÷1115]×58,=[45-0]×58,=45×58,=12;(3)2010÷20092008,=(2009+1)×20082009,=2009×20082009+1×20082009,=2008+20082009,=200820082009;(4)1.25×17.6+36.1÷80%+2....

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