Give a seven-year-old 3 tens and 53 ones and ask for the number. Many will say 83 without trouble, yet still write « 3 tens and 53 ones » when asked to show it in tens and ones. This 2nd grade regrouping tens and ones worksheet works on that gap. The first item walks through it step by step: 0 tens + 17 ones becomes 1 ten + 7 ones. Seven more follow, each with more than nine ones to sort out, from 3 tens + 30 ones to 8 tens + 12 ones. In two of them, the page already gives the ones, so your child only finds the tens. A second page gives the answer key.