(1)28-[19.08+(3.2-0.299÷0.23)]×0.5
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/13 19:16:28
(1)28-[19.08+(3.2-0.299÷0.23)]×0.5
(2)64×1.25×2.5×5
(3)34.5×9.23-34.5+1.77×34.5
(4)(67.8+9.48)÷0.96-2.58×3.35.
(2)64×1.25×2.5×5
(3)34.5×9.23-34.5+1.77×34.5
(4)(67.8+9.48)÷0.96-2.58×3.35.
(1)28-[19.08+(3.2-0.299÷0.23)]×0.5,
=28-[19.08+(3.2-1.3)]×0.5,
=28-[19.08+1.9]×0.5,
=28-20.98×0.5,
=28-10.49,
=17.51;
(2)64×1.25×2.5×5,
=2×4×8×1.25×2.5×5,
=(8×1.25)×(2.5×4)×(5×2),
=10×10×10,
=1000;
(3)34.5×9.23-34.5+1.77×34.5,
=(9.23-1+1.77)×34.5,
=10×34.5,
=345;
(4)(67.8+9.48)÷0.96-2.58×3.35,
=77.28÷0.96-2.58×3.35,
=80.5-8.643,
=71.857.
=28-[19.08+(3.2-1.3)]×0.5,
=28-[19.08+1.9]×0.5,
=28-20.98×0.5,
=28-10.49,
=17.51;
(2)64×1.25×2.5×5,
=2×4×8×1.25×2.5×5,
=(8×1.25)×(2.5×4)×(5×2),
=10×10×10,
=1000;
(3)34.5×9.23-34.5+1.77×34.5,
=(9.23-1+1.77)×34.5,
=10×34.5,
=345;
(4)(67.8+9.48)÷0.96-2.58×3.35,
=77.28÷0.96-2.58×3.35,
=80.5-8.643,
=71.857.
(1)28-[19.08+(3.2-0.299÷0.23)]×0.5
(1+0.23+0.34)*(0.23+034+0.56)-(1+0.23+0.34+0.56)*(0.23+0.34)
(1+0.23+0.34)×(0.23+0.34+0.56)-(1+0.23+0.34+0.56)×(0.23+0.34
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23
(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34
7.8×3.2+32×22 2.4.75÷(0.5×7.3+0.5×27) 3.9.4×【0.96÷(5.4÷0.9)】
计算:(1+0.23+0.34)*(0.2903+0.34+0.56)-(1+0.23+0.34+0.56)*(0.23
28÷(1-30%)等于多少.
求未知数x. 3.2×2.5-75%x=212÷(0.5x+1)=4(x-1):37
几道计算题一、 直接写得数:(共9分)1-0.09 = 4.25+0.5 = 28÷0.1 = 2÷5 = 0.49÷0
1.(1十0.23十0.34)*(0.23十0.34十0.56)一(1十0.23十0.34十0.56)*(0.23十0.
1÷0.25×(1.28÷3.2)用简便方法算