六年级上册数学黄冈的43页最后一题的答案(求阴影部分的周长面积)
2019-05-05
六年级上册数学黄冈的43页最后一题的答案(求阴影部分的周长面积)
优质解答
(2)C=3.14÷4÷2+2×3.14×4×0.125+4 S:3.14÷16×0.125-4×2÷2
=6.28+3.14+4 =3.14×16×0.125-4
=13.42(cm) =2.28(平方厘米)
(2)C=3.14÷4÷2+2×3.14×4×0.125+4 S:3.14÷16×0.125-4×2÷2
=6.28+3.14+4 =3.14×16×0.125-4
=13.42(cm) =2.28(平方厘米)