Tens and Ones Worksheet
A first grade place value sheet in three parts. Students count base-ten blocks (rods for tens, cubes for ones), split 2-digit numbers into tens and ones, then build numbers from tens and ones. Thirteen problems in all, with the answer key on page 2.
- Grade
- Grade 1
- Problems
- 13
- Time
- About 10 minutes
- Standard
- 1.NBT.B.2
Download
Download PDF (US Letter) Download PDF (A4)Two pages: the worksheet, then the answer key. No sign-up needed.
Part A: Count the blocks Count the tens and ones. Write the number.
- 4tens7ones=47
- 5tens5ones=55
- 3tens7ones=37
Part B: Tens and ones Write how many tens and ones.
- 59=5tens9ones
- 79=7tens9ones
- 19=1tens9ones
- 46=4tens6ones
- 93=9tens3ones
- 87=8tens7ones
Part C: Write the number Write the number.
- 1 ten 0 ones=10
- 2 tens 9 ones=29
- 2 tens 8 ones=28
- 8 tens 5 ones=85
Tips for teachers and parents
- If you have base-ten blocks or bundles of ten straws, build a few of the numbers first. Seeing ten ones turn into one ten is the key idea.
- Ask your student to count the rods by tens (10, 20, 30) and then count on the cubes by ones.
- For Part B, point to each digit and ask "how many tens does this 7 stand for?" The digit's place tells you.
- Part C includes a number with 0 ones. Ask what the 0 is doing in the number 50.
Common mistakes
- Counting every small square inside a rod one by one. Remind students that each rod is already a group of ten.
- Swapping the digits, for example writing 8 tens 2 ones as 28. Saying the number aloud ("eighty-two") helps.
What to practice next
Comparing numbers uses the same idea: look at the tens first, then the ones.
Frequently asked questions
What are tens and ones?
In a 2-digit number, the left digit tells how many groups of ten there are and the right digit tells how many single ones. 47 is 4 tens and 7 ones.
Does my child need base-ten blocks?
No. Part A shows pictures of blocks. Real blocks or bundled straws help, but they are optional.
Is there an answer key?
Yes, page 2 has all 13 answers.