4分之一x3.14x5x5一4分之1x3.14x2x2请问怎样算谢谢

2025-05-14 09:28:09
推荐回答(3个)
回答1:

回答2:

回答3:

1/4*3.14*5*5-1/4*3.14*2*2
=3.14*25/4-3.14
=3.14*(25/4-1)
=3.14*21/4
=16.485