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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)56-34÷310,=56-52,=-53;(4)35÷78×1-27,=40×1-27,=40-27,=3957.

(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,=4.82-6.5×0.6,=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)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)(512+19-38)×72=512×72+19×72?38×72=30+8-27=11

(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.

①6760÷13+17×25,=520+425,=945;②4.35×6.8+56.5×0.68,=4.35×6.8+5.65×6.8,=(4.35+5.65)×6.8,=10×6.8,=68;③49÷(56-12)×78,=49÷13×78,=43×78,=76;④346÷34.6%-346,=1000-346,=654.

(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....

(1)原式=-1-0.5×13×(-7)=-1+76=16;(2)原式=90°-40°39′+3°16′40″=93°16′40″-40°39′=52°37′40″;(3)原式=-4×54×(-120)=14;(4)原式=x3-2y3-3x2y-3x3+3y3+7x2y=(1-3)x3+(-2+3)y3+(-3+7)x2y=-2x3+y3+4x2y.

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