Starting with the column on the right with the least place value, i.e. with hundredths in this example, we say: **6 hundredths plus 0 hundredths is 6 hundredths, 5 tenths plus 2 tenths is 7 tenths ...

6 hundredths can't be taken from 0 hundredths, so we exchange 1 tenth for 10 hundredths. 10 hundredths - 6 hundredths = 4 hundredths. Image caption, 5 tenths is now 4 tenths because we exchanged 1 ...