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2.8×7.6+2.4×0.8用简便方法计算

6.7+2.4×6 =6.7+2×6+0.4×6 =6.7+12+2.4 =18.7+2.4 =21.1

8.5×7.6+2.4 =34x1.9+2.4 =68-3.4+2.4 =67

2.4×7.6+6.5×7.6+0.76×11 =7.6×(2.4+6.5+1.1) =7.6×10 =76 希望我的回答对您有帮助,有问题可以追问。 满意请及时采纳,谢谢!

二2.4X3X0.2十2.4X2.4 =2.4X0.6十2.4X2.4 =2.4X(0.6十2.4) =2.4X3 二7.2

6.7x0.1x2.4 =0.67x2.4 =0.67x2x1.2 =1.34x(1+0.2) =1.34+0.268 =1.608

1、7.74×(2.8-1.3)+1.5×2.26=7.74x1.5+2.26x1.5=(7.74+2.26)x1.5=10x1.5=15 2、7.2×0.2+2.4×1.4=2.4x0.6+2.4x1.4=2.4x(0.6+1.4)=2.4x2=4.8 3、2.22×9.9+6.66×6.7=6.66x3.3+6.66x6.7=6.66x(3.3+6.7)=6.66x10=66.6 4、12.7×9.9+1.27 =1.27x99+1.27...

(1)2.5×12.5×32=(2.5×4)×(12.5×8),=10×100,=1000;(2)6.4÷2.5÷0.4=6.4÷(2.5×0.4),=6.4÷1,=6.4;(3)5.4×0.36+0.64×5.4=5.4×(0.36+0.64),=5.4×1,=5.4;(4)9÷0.75+9÷0.25=12+36,=48;(5)17.2-0.71-0.29=17.2-(0.71+0.29

=2.4*20+2.4*0.6+33*7.6+0.1*7.6 =48+1.44+250.8+0.76 =298.8+2.2 =301

2.37*6.3/2.37*3.7 =(6.3/3.7)*(2.37/2.37) =6.3/3.7 =63/37 2.5*1.25*0.32 =2.5*1.25*0.4*0.8 =2.5*0.4*(1.25*0.8) =1*1 =1 3.8*10.1 =3.8*(10+0.1) =3.8*10+3.8*0.1 =38+0.38 =38.38 2.4*0.8-4.48/2.8 =2.4*0.8-1.6 =(2+0.4)*0.8-1.6 =2*0.8+0...

2.4×1.76-7.6×0.24用简便方法计算 =2.4×(1.76-0.76) =2.4×1 =2.4

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