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2.8×7.6+2.4×0.8用简便方法计算

2.8×7.6+2.4×0.8 =2.8×7.6+2.4×(2.8-2) =2.8×7.6+2.8×2.4-2.4×2 =2.8×(7.6+2.4)-4.8 =2.8×10-4.8 =28-4.8 =23.2

7.6x2.4+6.5x7.6+7.6+0.76 =7.6x(2.4+6.5+1+0.1) =7.6x(2.4+1+6.6) =7.6x(9+1) =7.6x10 =76

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

7.6+2.4*3.6 =7.6+8.64 =16.24

6.9+7.6-6.9+2.4 =(6.9-6.9)+(7.6+2.4) =0+10 =10 行家正解,不明白可以追问!祝您学习进步 满意请点击下面的【选为满意回答】按钮,O(∩_∩)O谢谢

=7.6×(2.4+6.5+0.76) =7.6×9.66 =73.416

12.4x7.6一2.4x7.6用简便方法计算 12.4x7.6一2.4x7.6 =7.6×(12.4-2.4) =7.6×10 =76

简便计算 9.7×7.6+ 11×2.8 +42.7×2.4 =9.7×7.6+ 11×2.8 +9.7×2.4+33×2.4 =9.7×(7.6+2.4)+11×2.8+11×7.2 =9.7×10+11×(2.8+7.2) =97+11×10 =97+110 =207

6.75÷2.7=2.5]

2.4×20.6+33.1×7.6 =2.4*20.6+33.1(10-2.4) =331-2.4*(33.1-20.6) =331-2.4*12.5 =331-0.3*8*12.5 =331-30 =301 465×8.2+465×29.6-365×37.8 =465*(8.2+29.6)-365*37.8 =37.8*(465-365) =37.8*100 =3780 = 4.25×166-42.5×14.2+24×5.75 =4.25*(166...

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