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用你喜欢的方法计算下面名题。54X0.28十46Ⅹ28%

54X0.28十46Ⅹ28%=54x0.28+46x0.28=(54+46)x0.28=100x0.28=28

=(54+46)X0.28=28

25*28=5*5*4*7 =5*(5*4)*7 =5*20*7 =700加油

①13.75-5.28-4.72 =13.75-(5.28+4.72)=13.75-10=3.75;②2.25+4.8+0.75 =4.8+(2.25+0.75)=4.8+3=7.8;③8-7.19+3.83 =0.81+3.83=4.64;④9.65-(7.03+1.65)=9.65-1.65-7.03=8-7.03=0.97;⑤8.4-7.85+3.2=0.55+3.2=3.75;⑥2.58-(3.5-2.42)=2.58+2.42-3.5=5-3.5=1.5.

(1)25.74-3.57-6.43=25.74-(3.57+6.43)=25.74-10=15.74(2)3.5÷[(0.45-0.38)*0.01]=3.5÷[0.07*0.01]=3.5÷0.0007=5000(3)12.5*3.4*8=(12.5*8)*3.4=100*3.4=340(4)9.4*[0.96÷(5.4÷0.9)]=9

(1)10.42+4.75-5.42=10.42-5.42+4.75=5+4.75=9.75;(2)( 2 3 - 1 4 )÷ 5 4 = 5 12 ÷ 5 4 = 1 3 ;(3)15*( 2 3 + 2 5 )=15* 2 3 +15* 2 5 =10+6=16;(4)[ 4 5 -( 4 5 - 2 3 )]÷ 1 2 =[ 4 5 - 4 5 + 2 3 ]÷ 1 2 = 2 3 ÷ 1 2 = 4 3 .

(1)5.28-0.44-(2.56-1.72)=5.28-0.44-2.56+1.72=5.28+1.72-(0.44+2.56)=7-3=4;(2)21÷[13 16 *(1-6 13 )]=21÷[13 16 *1-13 16 *6 13 ]=21÷[13 16 -6 16 ]=21*16 7 =48;(3)7.5*83-2.5*9=2.5*249-2.5*9=2.5*(249-9)=2.5*240=600;(4)1110÷[11*(5 11 -5 13 )*13]=1110÷[11*5 11 *13-11*5 13 *13]=1110÷[65-55]=1110÷10=111.

用简便方法计算下面名题57x20157x201=57*(200+1)=57*200+57*1=11457

用简便方法计算54x210+46x210=(54+46)x210=100x210=21000

54x28+46x28+28=28x(54+46)+28=28x100+28=2828祝天天向上.

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