一根钢管,内直径8厘米,管壁厚1厘米,长1米.这根钢管的体积有多少立方厘米?
8.99+0.1= 1﹣= 5﹣5÷2.5= 0、5×2.4= 0.1÷0.01= 0.43×(2.7+7.3)= 1.206×0.8≈(得数用四舍五入法凑整到百分位) 2998÷31≈(估算)
用竖式计算. 5.9+28.65﹣16.57= 4.68×0.72= 87.4÷0.38=
5.43+1.47= 5﹣3.28= 0.46÷4.6= 4×0.25= 3÷0.3= 4.5×0.4= 0.63÷0.7= 1.8×0.4= 9.58×101﹣9.58= 85÷(1﹣0.9)=
直接写出得数 5.43+1.47= 5﹣3.28= 0.46÷4.6= 4×0.25= 3÷0.3= 4.5×0.4= 0.63÷0.7= 1.8×0.4= 9.58×101﹣9.58= 85÷(1﹣0.9)=
口算 5﹣2.8= 4×0.25= 0.46÷4.6= 5.8+4.6= 0.32×0.2= 32.1×0.3= 7.5﹣0.3= 3.2÷0.08=