简便计算 51分之49乘23
问题描述:
简便计算 51分之49乘23
答
49/51*23=1127/51
答
等于51分之1127
答
1
答
49/51×23
=(1-2/51)×23
=1×23-2/51×23
=23-46/51
=22又51分之46
答
49/51*23=(51-2)/51*23=23-2/51*23=22又5/51