Question

5,356+2,398
=(5,356+2)+ (2,398 + 2)
5,358+2400=7,758


is kElly's answer correct? what mistake did she make? ​

Answer 1

Answer:

No because she added 2 instead of 2398. She thought the 2 was separate because of the comma separating the 2 thousand. She also made a mistake by thinking she could add easily by adding 2 to 2398 to make 2400.