51*49+3.51*49+51*3.51

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 16:29:02
51*49+3.51*49+51*3.51

51*49+3.51*49+51*3.51
51*49+3.51*49+51*3.51

51*49+3.51*49+51*3.51
51*49+3.51*49+51*3.51
=51*49+3.51*(49+51)
=51*49+3.51*100
=(50+1)*49+351
=50*49-1*49+351
=2450-49+351
=2401