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2.5 0.3 0.9脱式计算

2.5乘3.6除以0.9的脱式计算2.5*3.6÷0.9=2.5*(3.6÷0.9)=2.5*4=10

2.5+13+0.9=13+2.5+1-0.1=14+2.5-0.1=14+2.4=16.4

2.5*3.6*0.9的脱试计算2.5*3.6*0.9=2.5*4*(0.9*0.9)=10*0.81=8.1

0.3*2.5*0.4 =0.3*(2.5*0.4 )=0.3*0.1=0.03

0.3*2.5*0.4 =0.3(*2.5* 0.4) =0.3*1 =0.3

(1)6.8*0.75÷0.5,=68*(0.75÷0.5),=68*1.5,=102;(2)13.5÷2.5-2.75,=5.4-2.75,=2.65;(3)0.125*0.25*32,=0.125*0.25*4*8,=(0.125*8)*(0.25*4),=1*1,=1;(4)0.9+9.9+99.9+0.3,=(1-0.1)+(10-0.1)+(100-0.1)+0.3,=111-0.3+0.3,=111.

4.2+15.6 24.8-18.2 13+7.1 10-9.05 3.96+6.04 4.03-1.970.3+0.4 1.5+0.5 2.4+1.2 4.5-0.9 5.3-4.8 8+2.57.65+2.13 3.14-2.09 0.96+4.68 8-7.562.1+0.2= 0.3+0.7= 3.6+1.6= 7.5-0.5= 3.7-0.9= 2.13-0.02= 3.51+0.2= 102+0.3= 1.12-1.02= 4.5-0.01=

1、 1.25*(8+10)=1.25*8+1.25*10=10+12.5=22.52、1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.783、1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/54、4800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=485、2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/86、3/4-

脱式计算(一)9.4+0.3-6.4 34.82-(4.82+15.2) 15.25+4.72+4.75+5.28 =9.4-6.4+0.3 =34.82-4.82-15.2 =(15.25+4.75)+(4.72+5.28) =3+0.3 =30-15.2 =20+10 =3.3 =14.8 =30 12.7-4.8-5.2 3.1+25.78+6.9 73.8-1.64-13.8-5.36=12.7-(4.8+5.2) =25.78+(3.

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