Free printable practice
Adding By Completing Whole Tens Practice Activities
Grade 2 addition worksheets that help children add by making the next whole ten before adding the remaining amount.
Practice that builds confidence
What this strategy means
These Grade 2 math worksheets help children practise adding by completing whole tens, a mental addition strategy that makes numbers easier to work with. Children learn to break apart the second addend, make a friendly ten, and then add what is left.
The printable activities include number sentences, missing-number steps, and structured practice that shows how an addition problem can be changed into a simpler one. This supports flexible thinking beyond counting on one by one.
Adding by completing whole tens means looking at the first number and asking, “How many more to the next ten?” For example, in 47 + 8, a child can split 8 into 3 and 5, make 50, and then add 5 more to get 55. The focus is not a new rule to memorize, but a way to use place value and number bonds to make addition easier.
How the practice progresses
These worksheets guide children from visible steps to more independent thinking. Early problems may show the missing part needed to reach the next ten. Later items ask children to choose how to split an addend or complete the addition sentence. This progression helps students see that 38 + 6 can become 40 + 4, or 69 + 7 can become 70 + 6.
A simple parent routine
At home, choose three problems from a worksheet and say them aloud. Ask your child, “What ten are we trying to reach?” Then have them circle or write the part that completes the ten before adding the leftover amount. If they get stuck, use a number line or ten-frame sketch, but return to the written equation so they connect the model to the strategy.
Classroom uses for teachers
Teachers can use these pages for small-group instruction, math centers, morning work, or quick checks after a lesson on mental addition. They are also useful for comparing strategies: one student may count on, while another completes the ten. Discussing both methods helps the class understand why making a whole ten is often faster and more reliable.
Common errors to watch for
Children sometimes add the whole second number after already using part of it to make the ten. For 56 + 9, they may make 60 with 4 and then add 9 instead of the remaining 5. Encourage them to label the split addend, such as 9 = 4 + 5. Another common error is choosing the wrong next ten, especially near numbers like 79 or 89.
Free printable PDF download
Use this grade 2 adding by completing whole tens worksheet page to preview the activity, print it, or download it as a PDF for quick practice. It works well for homework, homeschool lessons, tutoring, morning work, revision, and classroom centers.
Answers and answer key support
After the child completes the worksheet independently, parents and teachers can use the answer support or answer key information to check the work, review mistakes, and choose the next practice step.
Why iBloom worksheets help
iBloom worksheets keep the layout clear so Grade 2 learners can focus on the reasoning: make the next whole ten, add the leftover part, and check the total. A child-friendly strategy is: “Find the next ten, take just enough, then add the rest.” Repeating this with varied numbers builds confidence with addition facts, place value, and mental math.
Helpful answers
Frequently asked questions
What does adding by completing whole tens mean?
It means breaking apart one addend so the first number reaches the next multiple of ten, then adding the leftover amount. For example, 48 + 7 becomes 50 + 5.
Why is this strategy useful for Grade 2 students?
It strengthens place value understanding and helps children move beyond counting one number at a time. Whole tens are easier to add mentally, so the strategy supports faster and more flexible addition.
Should my child still know basic addition facts?
Yes. This strategy works best when children can use small number bonds, such as knowing that 6 needs 4 to make 10. The worksheets reinforce those facts in a larger addition context.
What should I do if my child uses the whole addend twice?
Have them write the split clearly. For 57 + 8, show 8 = 3 + 5, then 57 + 3 = 60 and 60 + 5 = 65. This prevents adding all 8 again after making the ten.
Can these worksheets be used for mental math practice?
Yes. Children can first solve with written steps, then explain the same steps aloud. Over time, they can complete the ten and add the remaining part mentally.
Is this grade 2 adding by completing whole tens worksheet free?
Yes. You can preview it for free and use the printable worksheet for home or classroom practice.
Can I download this grade 2 adding by completing whole tens worksheet as a PDF?
Yes. Use the worksheet download option to save a printable PDF, or print the worksheet directly from the page.
Does this grade 2 adding by completing whole tens worksheet include answers or an answer key?
When the activity has fixed answers, iBloom includes answer support so parents and teachers can check the completed worksheet.