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2.8 3.6 1.4 2.8简便计算

3.6+1.4

9.6*1.5/2.4简便计算 8.1/1.8简便计算 5.6/3.5简便计算 -1/8+3/4-(-1/2)-1/4+0.6简便运算 简便计算 3.6*2.5/1.8 (2+4+6+8++100)-(1+3+5+7++99)怎样计算会比较简便

2.8*3.6+1.4÷2.8=2.8X4-2.8X0.4+0.5=11.2-1.12+0.5=10.08+0.5=10.58

2.8*1.4+3.6*2.8=2.8*(1.4+3.6)=2.8*5=14

2.8*3.6+1.4*2.8=2.8*(3.6+1.4)=2.8*5=14

(1)18.8*0.96÷(5.4÷0.9), =18.8*0.96÷6, =18.8*(0.96÷6), =18.8*0.16, =3.008; (2)2.8*3.6+1.4*2.8, =2.8*(3.6+1.4),=2.8*5, =14; (3)78.7-1.25-1.75, =78.7-(1.25+1.75), =78.7-3, =75.7; (4)72÷0.8-16*0.5, =90-8, =82.

(3.6+1.4)*2.8=5*2.8=?

4.5x2.8+1.4=4.5x2x1.4+1.4=9x1.4+1.4=(9+1)x1.4=10x1.4=14

①25.74-3.57-6.43=25.74-(3.57+6.43)=25.74-10=15.74②2.8*3.6+1.4*2.8 =2.8*(3.6+1.4)=2.8*5=14③(0.4+40)*2.5=2.5*0.4+40*2.5=1+100=101④78.7-17.7*3.6=78.7-63.72=14.98⑤567÷20÷5 =567÷(20*5)=567÷100=5.67⑥18÷0.3*(8-6.5)=60*1.5=6*10*1.5=6*15=90

(1)2.8*3.6+1.4*2.8 =2.8*(3.6+1.4)=2.8*5=14(2)4.536÷4÷0.25=4.536÷(4*0.25)=4.536÷1=4.536(3)9.9+9.9*99=9.9*(1+99)=9.9*100=990(4)6.3*10.1=6.3*(10+0.1)=6.3*10+6.3*0.1=63+0.63=63.63(5)3.6*1.9+0.36*81=3.6*1.9+3.6*8.1=3.6*(1.9+8.1)=3.6*10=36(6)15.58÷8.2-0.72=1.9-0.72=1.18

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