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🔢 1st grade math · Counting & Numbers

Tens and ones

A long rod is 1 ten. A small cube is 1 one. 3 rods and 4 cubes is 34.

Worked example

What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
Answer: 18
There are 1 tens and 8 ones. 1 tens is 10, and 8 more is 18. Answer: 18.

For grown-ups: Tens and ones; 10 = a bundle of ten ones. Below: three problems to try with the worked answers, and a free printable sheet. Children can practise the same skill as a game, with no sign-up and no ads.

  • CCSS 1.NBT.B.2
What this practises, for teachers

Practices tens and ones; 10 = a bundle of ten ones (1.NBT.B.2). A printable sheet with its answer key, worked answers on the page, no accounts.

▶ Practise it

For your class

🖨️ Printable sheet and key

On the board with this skill:

Try three

  1. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
    Show the answer and how
    Answer: 10
    There are 1 tens and 0 ones. 1 tens is 10, and 0 more is 10. Answer: 10.
  2. How many tens (long rods) are there?
    Show the answer and how
    Answer: 1
    There are 1 tens and 8 ones. 1 tens is 10, and 8 more is 18. The answer to this question is 1. Answer: 1.
  3. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
    Show the answer and how
    Answer: 54
    There are 5 tens and 4 ones. 5 tens is 50, and 4 more is 54. Answer: 54.

Before and after

Learn first: Teen numbers: ten and more (K)

Comes next: Compare two-digit numbers (1st), Ten more, ten less (1st)

Name: ____________________Date: ____________Score: ____ / 12

Tens and ones (1st grade)

  1. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  2. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  3. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  4. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  5. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  6. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  7. How many tens (long rods) are there?
  8. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  9. How many ones (small cubes) are there?
  10. What number do the blocks show? (Each long rod is 1 ten, each small cube is 1 one.)
  11. How many ones (small cubes) are there?
  12. How many ones (small cubes) are there?

Answer key

  1. 13
  2. 33
  3. 10
  4. 29
  5. 57
  6. 35
  7. 3
  8. 56
  9. 8
  10. 10
  11. 9
  12. 3

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