We should carry it over to the ones place because ten 0.1 s equal 1.

生:十分位满十,应向个位进一.因为十分位满十,表示10个0.1,10个0.1是1.所以应向个位进一.

互联网

Line up 6 and 2, 5 and 7 . Then add from the ones place.

生:先把6角和2角对齐, 5分和7分对齐,从个位加起.

互联网