递等式计算能巧算的要巧算谢谢?

2025-01-21 06:37:24
推荐回答(1个)
回答1:

15.8-5.8x1.7+8.3
=15.8+8.3-9.86
=26.1-10+0.14
=16.1+0.14
=16.24
1.82+18.2x0.9
=1.82+1.82x9
=1.82x(1+9)
=1.82x10
=18.2