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☆算术计算1题
〖1/1算式〗
作业:求算式 ((60%-30%)^2*0.3+(40%-30%)^2*0.2+(20%-30%)^2*0.3+(-10%-30%)^2*0.2)^(1/2) 的值.
题型:数学计算
解:
((60%-30%)^2*0.3+(40%-30%)^2*0.2+(20%-30%)^2*0.3+(-10%-30%)^2*0.2)^(1/2)
=(0.3^2*0.3+(40%-30%)^2*0.2+(20%-30%)^2*0.3+(-10%-30%)^2*0.2)^(1/2)
=(0.3^2*0.3+0.1^2*0.2+(20%-30%)^2*0.3+(-10%-30%)^2*0.2)^(1/2)
=(0.3^2*0.3+0.1^2*0.2+(-0.1)^2*0.3+(-10%-30%)^2*0.2)^(1/2)
=(0.3^2*0.3+0.1^2*0.2+(-0.1)^2*0.3+(-0.4)^2*0.2)^(1/2)
=0.064^(1/2)
=0.064^0.5
=0.25298221281347 答案:((60%-30%)^2*0.3+(40%-30%)^2*0.2+(20%-30%)^2*0.3+(-10%-30%)^2*0.2)^(1/2)=0.25298221281347你的问题在这里没有得到解决?请到 热门难题 里面看看吧!