小升初真題每日一練2010.07.19中難度
[答案]4098760
[詳解]123456+234567+345678+456789+567901+679012+790123+901234
=(123456+901234)+(234567+790123)+(345678+679012)+(456789+567901)
=1024690+1024690+1024690+1024690
=1024690×4
=4098760
[考點]巧算數(shù)字
[易錯點]找整數(shù)相加