47.3+21X(3.9-0.87)等于多少?

2025-08-18 12:42:37
推荐回答(1个)
回答1:

47.3+21*(3.9-0.87)
=48-0.7+21(3+0.03)
=48+63+21*0.03-0.7
=111+7(0.09-0.1)
=111-0.07
=110.93