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3.14x36

竖式 3. 1 4 x 3 6 ______________ 1 8 8 4 9 4 2 ———————— 1 1 3. 0 4

-3.14x35.2+6.28x(-23.3)-1.57x36.4 =-3.14x35.2+3.14x(-46.6)-3.14x18.2 =-3.14x(35.2+46.6+18.2) =-3.14x100 =-314

56.52

利用乘法分配律简便计算 31.4x2.2+3.14x36+314x0.42 =3.14x22+3.14x36+3.14x42 =3.14x(22+36+42) =3.14x100 =314

(3.14-1.4)x36 =36*1.74 =62.64 ‘没有简算,直接计算

3.14x=75.36-x 4.14X=75.36 x=24

计算结果等于1884/5,等于376.8

周长: 87×2+3.14×36×2 =174+226.08 =400.8米 面积: 3.14×36×36+87×36×2 =4069.44+6264 =10333.44平方米

3.14x35.2+6.28x23.3+1.57x36.4 =3.14x35.2+3.14x46.6+3.14x18.2 =3.14x(35.2+46.6+18.2) =3.14x100 =314

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