Question

如何巧算1234.321×7.2+33.36×10.1×3.3？

Answer 1

1234.321×7.2十33.36×10.1×3.3
=11×(112.211×7.2十33.36×10.1×0.3)
=11×0.3×(112.211×24十33.36×10.1)
=11×0.3×3×(112.211×8十11.12×10.1)
=9.9×8×(112.211十1.39×10.1)
=9.9×8×(112.211十1.39×10十1.39×0.1)
=9.9×8×(112.211十13.9十0.139)
=9.9×8×126.250
=9.9×4×252.5
=9.9×(1000十10)
=9900十99
=9999

Answer 2

1234.32107.2+33.36×1.1×3.3如何场合计算的话，把个位相乘把然后把个位相加就好了。

Answer 3

1234.321×7.2十33.36×10.1×3.3
=11×(112.211×7.2十33.36×10.1×0.3)
=11×0.3×(112.211×24十33.36×10.1)
=11×0.3×3×(112.211×8十11.12×10.1)
=9.9×8×(112.211十1.39×10.1)
=9.9×8×(112.211十1.39×10十1.39×0.1)
=9.9×8×(112.211十13.9十0.139)
=9.9×8×126.250
=9.9×4×252.5
=9.9×(1000十10)
=9900十99
=9999

Answer 4

1234.321×7.2十33.36×10.1×3.3
=11×(112.211×7.2十33.36×10.1×0.3)
=11×0.3×(112.211×24十33.36×10.1)=11×0.3×3×(112.211×8十11.12×10.1)
=9.9×8×(112.211十1.39×10.1)
=9.9×8×(112.211十1.39×10十1.39
×0.1)
=9.9×8×(112.211十13.9十0.139)
=9.9×8×126.250
=9.9×4×252.5
=9.9×(1000十10)
=9900十99
=9999