Question

15.9×1.93+1.59×0.7简便运算？

Answer 1

15.9×1.93+1.59×0.7简尘戚仿便派纤运仔判算
=15.9×1.93+15.9×0.1×0.7
=15.9×(1.93+0.07)
=15.9×2
=31.8

Answer 2

解乎毕带数前：15.9×1.93+1.59×0.7
原式岁芦=1.59×19.3+1.59×0.7
=1.59×(19.3+0.7)
=1.59×20
=31.8