Question

6.36x3.33+7.88x9.99怎样简便方法有几种

Answer 1

6.36×3.33+7.88×9.99
=2.12×3×3.33+7.88×9.99
=（2.12+7.88）×9.99
=10×9.99
=99.9

Answer 2

6.36x3.33+7.88x9.99
=(6.36+7.88×3)×3.33
=(6.36+7×3+0.8×3+0.08×3)×3.33
=(6.36+21+2.4+0.24)×3.33
=30×3.33
=99.9

Answer 3

方形一：
6.36×3.33+7.88×9.99
=2.12×3×3.33+7.88×9.99
=2.12×9.99+7.88×9.99
=（2.12+7.88）×9.99
=10×9.99
=99.9
方法二：
6.36×3.33+7.88×9.99
=6.36×3.33+7.88×3×3.33
=6.36×3.33+23.64×3.33
=（6.36+23.64）×3.33
=30×3.33
=99.9

Answer 4

原式变换为6.36x3.33+7.88ⅹ3x3.33然后提取公因试得3.33ⅹ(6.36+23.64)=99.9也可变换为9.99x2.12+7.88x9.99=99.9

Answer 5

6.36x3.33+7.88x9.99=2.12x3x3.33+7.88x3x3.33=(2.12+7.88)3x3.33=10x9.99=99.9