1： ⑴C ⑵A ⑶B ⑷ C 2： 图一 3.14x3－3.14x2 =3.14x9－3.14x4 =3.14x5 =15.7 图二 8÷2=4 3.14x4÷2+8x4 = 3.14x16÷2+8x4 =25.12+32 =57.12 图三 3： 62.8÷3.14÷2=10(米) 10+1=11(米) 3.14x11－3.14x10 = 3.14x121－3.14x100

thank you very mach

太好了，谢谢！:loveliness: