Question

21/3×5/42×5/3×1/2+4/3怎么用简便运算

Answer 1

21/3×5/42×5/租巧3×1/2+4/3怎么用简便运算:
简桐肢算过程如下:
21/3×5/42×5/3×1/2+4/3
=7×5/42×5/3×1/2+4/3
=5/6×5/3×1/弊轮键2+4/3
=25/18×1/2+4/3
=25/36+48/36
=73/36=2又1/36
其实就是先算出21/3=21÷3=7，再用7和5/42约分。剩下的口算就可以了

Answer 2

21/3×5/42×5/租巧3×1/2+4/3怎么用简便运算:
简桐肢算过程如下:
21/3×5/42×5/3×1/2+4/3
=7×5/42×5/3×1/2+4/3
=5/6×5/3×1/弊轮键2+4/3
=25/18×1/2+4/3
=25/36+48/36
=73/36=2又1/36
其实就是先算出21/3=21÷3=7，再用7和5/42约分。剩下的口算就可以了

Answer 3

简扮颤凯洞衡算过程如下: 21/3×5/42×5/3×1/2+4/3 =7×5/42×5/3×1/2+4/3 =5/6×5/3×1/2+4/3 =25/18×1/2+4/3 =25/36+48/36 =73/36=2又1/36 其实就是先算出21/3=21÷3=7,再用厅唤7和5/42约分。剩下的口算就可以了

Answer 4

简算过程如下:
21/3×5/42×5/3×1/2+4/3
=7×5/42×5/瞎态3×1/2+4/3
=5/6×5/3×1/2+4/3
=25/18×1/2+4/3
=25/36+48/36
=73/36=2又1/36
其实就是先算樱神陵出21/3=21÷3=7，再用7和5/42约分。剩下的口算就行了(都是乘法口诀能解决的脊戚)

Answer 5

简算过程如下:
21/3×5/42×5/3×1/2+4/3
=7×5/42×5/3×1/2+4/3
=5/6×5/3×1/2+4/3
=25/18×1/2+4/3
=25/36+48/36
=73/36=2又1/36
其实就是厅扰厅先算出21/3=21÷3=7，再用7和5/42约分。扮隐剩下的口算就可李搜以了