39×101 25×41 76×25+25×24 88×102用简便方法怎么算(写成脱式计算)
39×101 25×41 76×25+25×24 88×102用简便方法怎么算(写成脱式计算)
日期:2021-08-09 21:07:49 人气:1
39x101
=39x(100+1)
=39x100+39
=3900+19
=3919
25x41
=25x(40+1)
=25x40+25
=1000+25
=1025
76x25+25x24
=25x(76+24)
=25x100
=2500
88x102
=88x(100+2)
=88x10
=39x(100+1)
=39x100+39
=3900+19
=3919
25x41
=25x(40+1)
=25x40+25
=1000+25
=1025
76x25+25x24
=25x(76+24)
=25x100
=2500
88x102
=88x(100+2)
=88x10