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.