Trade the Ten Answer Key
About This Worksheet
Trade the Ten is a second grade place-value activity that guides students through regrouping inside a tens-and-ones chart. Each problem already breaks the addends into their tens and ones digits. Students add the ones, recognize when the total reaches 10 or more, trade 10 ones for 1 ten, and then add the tens. For example, in 34 + 18, students first find 4 + 8, regroup part of that total into an extra ten, and then combine 3 tens, 1 ten, and the regrouped ten. This helps children connect the familiar carrying process with the actual place-value exchange happening underneath it.
Curriculum and Grade Alignment
This worksheet is made for second grade learners who are moving from concrete base-ten models toward written addition strategies. The main goal is to help students organize regrouping by place value and understand why the tens column increases. Before using this page, your child should be able to identify the tens and ones in any two-digit number. The next step is applying the same reasoning to vertical addition without a labeled chart. This activity supports second grade addition standards by emphasizing place-value structure rather than memorized procedures.
Student Tasks
On this worksheet, students will complete eight regrouping problems using tens-and-ones charts. They add the ones in the right-hand section, determine whether a group of 10 needs to be traded, and record the regrouped value. Students then add the tens in the left-hand section and write the final sum. The problems include 34 + 18, 27 + 16, 45 + 29, 38 + 17, 56 + 18, 49 + 24, 68 + 15, and 37 + 26. Each problem provides guided blanks so students can show the intermediate calculations.
Common Challenges and Misconceptions
Some students may add the ones correctly but write a two-digit answer entirely in the ones column. Others may remember to carry a 1 without understanding that it represents 1 ten. A child may also add the regrouped ten twice or leave it out altogether. Encourage your child to say, “10 ones become 1 ten,” whenever the ones total reaches 10 or more. This reinforces the meaning of the regrouping step.
Implementation Guidance
Teachers can use this worksheet after students are comfortable regrouping with physical blocks. It works well as a transitional activity before introducing less-supported stacked addition. Parents can have the child label the tens and ones in each addend before beginning the arithmetic. When regrouping occurs, ask, “Where does the new ten go, and why?” Requiring that explanation helps make the process more meaningful.
Details and Features
This worksheet includes eight guided two-digit addition problems with labeled Tens and Ones sections. Intermediate equations are built directly into each chart so students can record how each place value changes. Every problem requires attention to regrouping, making the page focused practice rather than a mixed review. Large answer lines provide space for the final sum. The printable supports place-value alignment, composing tens, regrouping, and structured computation.