Tutorpip← About this lessonOpen the sheet →Download PDF
Grade 3 · Maths · Lessons
Times a whole ten
🔟ten✖️times🧱put aside0️⃣zero
Times a ten.
The big ideaPut the ten aside, multiply, then put the ten back.

How it works

Put the ten aside, multiply, then put the ten back.

5 × 10 is 5 tens, which is 50.

50 × 9: do 5 × 9 = 45, then 45 tens is 450.

Put the ten aside: 5× 95 × 9 = 45Put the ten back: 450
50 × 9.

Example 1: Times 10

  1. ? = 5 × 10
  2. 5 × 10 is 5 tens.
  3. 5 tens is 50.
  4. So the answer is 50.

Example 2: The other way

  1. 7 × 10 = ?
  2. 7 × 10 is 7 tens.
  3. 7 tens is 70.
  4. So the answer is 70.

Example 3: A multiple of ten

  1. 50 × 9 = ?
  2. Do 5 × 9 first.
  3. Then put the ten back: 45 tens.
  4. So the answer is 450.

Words to know

multiple
A number you get by counting in steps of another.
ten
A group of 10.

Watch out

Try it

  1. 5 × 90 = ?
  2. 3 × 30 = ?
  3. ? = 8 × 60
Answers: 1. 450 · 2. 90 · 3. 480
For grown-upsPractise with money: 6 ten-dollar bills is 60 dollars.
Open these notes on screenScan the code, or go to tutorpip.com.