Grade 1 · Maths · Lessons
Tens and ones
📏ten rod🧊one cube🔟tens1️⃣ones
Tens and ones.The big ideaCount the tens, then the ones. Ten ones make a ten.
How it works
A rod is ten. A cube is one.
Ten ones make one ten.
Count the tens first, then the ones: 6 tens and 9 ones is 69.
Example 1: Read the blocks
- You see 1 rod and 5 cubes.
- 1 ten and 5 ones.
- The blocks show 15.
Example 2: Split a number
- 90 has how many tens and ones?
- 9 tens and 0 ones.
- 90 is 9 tens and 0 ones.
Example 3: Two digits
- You see 6 rods and 9 cubes.
- Tens first: 60. Then the ones: 9.
- 60 + 9 = 69.
Words to know
- ten
- A group of 10, like a rod.
- one
- A single cube.
Watch out
- The first digit is the tens and the second digit is the ones.
- A zero means none of that place.
- Ten ones make a ten, so 10 cubes become 1 rod.
Try it
- How many tens and ones are in 34?
- What number is 5 tens and 2 ones?
- How many ones are in 80?
- Ten ones make what?
Answers: 1. 3 tens and 4 ones · 2. 52 · 3. 0 · 4. one ten
For grown-upsMake a number with straws bundled in tens and loose ones, and have your child read it.