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×15= ×4.8= 2- = 1.4+20%=
÷ = 5÷ = ×75%= ×4× =
3.14×20= + = 0.5÷0.01= 0.32× =
21÷21%= × = 6-3 = ÷ =
-25%= 5×3.14= 50%×86= 12.5%÷ =
1-35%= ×18.84= 60÷30%= 3.14×32=
圆锥的底面周长是12.56米,高是1.8米
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