简算:15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 03:17:50
简算:15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1

简算:15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1
简算:15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1

简算:15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1
15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1
=(15.37-9.37)*7.98+(15.37-1.937)*2.11
=6*7.98+13.433*2.11
=47.88+28.34363
=76.22363

=(15.37-9.37)*7.98+(15.37-19.37)*2.11
=47.88+-4*2.11
=47.88-8.44
=39.44

15.37*7.98-9.37*7.98+15.37*2.11-1.937*21.1
=(15.37-9.37)*7.98+1.537*21.1-1.937*21.1
=6*7.98+(1.537-1.937)*21.1
=6*7.98-0.4*21.1
=6*(8-0.02)-8.44
=48-0.12-8.44
=48-8.56
=39.44