问题
解答题
|
答案
749+163=912,
749
,+163 912
验算:912
;-163 749
940-490=450,
940
,-490 450
验算:450
;+490 940
808-108=700,
808
,-108 700
验算:700
.+108 808
|
749+163=912,
749
,+163 912
验算:912
;-163 749
940-490=450,
940
,-490 450
验算:450
;+490 940
808-108=700,
808
,-108 700
验算:700
.+108 808