四年级速算与巧算数学思维练习题(一)(2)
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2018-03-01 17:39:04
7500÷25÷4=146×1000÷125 =211×1001÷211 =7500÷(25×4)=146×8 =1001 =7500÷100=1168 =75
7500÷25÷4=146×1000÷125 =211×1001÷211 =7500÷(25×4)=146×8 =1001 =7500÷100=1168 =75