作业帮124.68+324.68+524.68+724.68+924.68怎样计算?
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/15 22:58:22
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124.68+324.68+524.68+724.68+924.68怎样计算?
124.68+324.68+524.68+724.68+924.68怎样计算?
124.68+324.68+524.68+724.68+924.68怎样计算?
计算器杠上、
124.68+324.68+524.68+724.68+924.68
=100+300+500+700+900+24.68×5
=2500+123.4
=2623.4
先算百位，1+3+5+7+9=25，也就是2500
再算后面的24*5=120
最后算分数0.68*5=3.4
把这三个数相加：2623.4
其中运用了拆分数，乘法是加法的简便运算，特殊数据的求和公式：（a1+an）×n÷2
124.68+324.68+524.68+724.68+924.68
=100+24.68+300+24.68+500+24.68+700+24.68+900+24.68
=100+300+500+700+900+24.68×5
=(100+900)×5÷2+123.4
=2500+123.4
=2623.4
124.68+324.68+524.68+724.68+924.68怎样计算?
124.68+324.68++524.68+724.28+924.68的简便运算
求124.68+324.68+524.68+724.68+924.68=?的简便计算,
124.68+324.68+524.68+724.68+924.68要用小数巧算做,要写详细一点.
124.68+32.468+524.68+724.68+9谢谢 sorry 错了！124.68+32.468+524.68+724.68+924.68注意第二个的小数点 不是324.68 是32.468！
小学举一反三六年级数学（第三周）例题1例题：1234+2341+3412+4123=1*1111+2*1111+3*1111+4*1111=（1+2+3+4）*1111=10*1111=111101.23456+34562+45623+56234+623452.45678+56784+67845+78456+845673.124.68+324.68+524.68+724.68+924.68最好
174.68+274.68+524.68+724.68+924.68