请大神帮忙算一下!

2025-01-01 05:37:37
推荐回答(1个)
回答1:

①8×4-3.14×4²/2
=32-25.12
=6.88厘米²
②(3+4)×2/2-3.14×2²/4-2×2/2
=7-3.14-2
=1.86厘米²