48×213-13简便计算
问题描述:
48×213-13简便计算
急
答
48×213-13
=(50-2)x213-13
=50x213-2x213-13
=10650-426-13
=10211
48×213-13
=48x200+48x13-13
=9600+47x13
=9600+(50-3)x13
=9600+50x13-3x13
=9600+650-39
=10211