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72层34+67乘34r怎样算最简便?????

72✘34+72✘67-72简便计算 72✘34+72✘67-72 =72*(34+67-1) =72*100 =7200

72乘34加72乘67减72简便运算 72乘34加72乘67减72 =72*(34+67-1) =72*100 =7200

72乘34加72乘67减72的简便运算 =72x(34+67-1) =72x100 =7200

34*34—34+34*67=34(34—1+67)=34*100=3400

2.68乘34.9除以34.9乘67.8除以2.68怎样列简便计算 =2.68/2.68x34.9/34.9x67.8 =1x1x67.8 =67.8

67x34+67x66 =67x(34+66) =67x100 =6700

你好,很高兴能够在这里回答你的问题,这道题的正确答案应该为: 68x34+68x67-68 =68x(34+67-1) =68x100 =6800 *************************************************************** ^__^真心祝你学习进步,如果你对这个答案有什么疑问,请追问, ...

每个数位都是1加到91加到9=(1+9)*9/2=45得原算式=45*11。11=499。95

34+43+66+67 =(34+66)+(43+67) =100+110 =210

28.67×6.7+0.32×286.7+5.734×0.5 =28.67×6.7+3.2×0.1×286.7+2.867 =28.67×6.7+3.2×28.67+28.67×0.1 =28.67×(6.7+3.2+0.1) =28.67×10 =286.7

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