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2.6×9.9脱式计算

2.6×9.9脱式计算 解:采用凑整法和分配律的简便方法, 原式=2.6x(10-0.1) =2.6x10-2.6x0.1 =26-0.26 =25.74

2.6×1.9÷2.6×1.9 =(2.6÷2.6)×(1.9×1.9) =1×3.61 =3.61

2.6×1.9-1.9×2.6 =2.6×(1.9-1.9) =2.6×0 =0

就服你这样问问题的! 1、 8 × 9 - 6 =72 - 6 = 66 2、 8 ×(9 - 6) = 8 × 3 = 24 脱式计算要把每一个过程写出来,且等号不能与之同行,要写在下面

13.6×9.9-13.6×8.9 =13.6×(9.9-8.9) =13.6×1 =13.6 望采纳

4.635

(9.56+9.56+9.56+9.56)x2.5 =9.56×4x2.5 =9.56×(4×2.5) =9.56×10 =95.6

9.99×9+9.9 =9.99×(9+1) =9.99×10 =99.9

198÷2÷9=99÷9=11;9×(25+55)=9×80=720;72÷8×16=9×16=144;6×19×5=114×5=570.

10x8.2—0.1x8.2=82-0.82=81.18

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