36×25 简便算法 =.=.

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36×25简便算法=.=.36×25简便算法=.=.36×25简便算法=.=.36*25=(4*25)*9=90036×25=9×4×25=9×100=900=9X4X25=9X100=9004*9*

36×25 简便算法 =.=.
36×25 简便算法 =.=.

36×25 简便算法 =.=.
36*25=(4*25)*9=900

36×25
=9×4×25
=9×100
=900

=9X4X25
=9X100
=900

4*9*25=100*9=900

36×25 简便算法 =....9×(4×5)×5.............. =....9×20×5=9×100=900..............

36×25
=9×4×25
=9×(4×25)
=9×100
=900

36×25
=36*100/4
=900