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Grade 2 · Maths · Lessons
Four numbers at once
1️⃣ones🔟tens➕add📋column
Add many at once.
The big ideaOnes with ones, tens with tens. Every ten ones moves one place left.

How it works

Line the numbers up in a column: ones under ones, tens under tens.

Add the ones column first. If it makes ten or more, write the ones and move the tens over.

Then add the tens column, plus anything you moved.

Example 1: Three numbers

  1. 49 + 14 + 14 = ?
  2. Line up the ones and the tens.
  3. Add the ones column, move any tens, then add the tens column.
  4. So the answer is 77.

Example 2: Four numbers

  1. 37 + 32 + 38 + 33 = ?
  2. Add the ones column. It may need to move more than one ten.
  3. Then the tens, counting what you moved.
  4. So the answer is 140.

Example 3: A total over a hundred

  1. 44 + 5 + 56 + 49 = ?
  2. Add the ones, then the tens.
  3. When the tens make ten or more, that is a hundred.
  4. So the answer is 154.

Words to know

column
Numbers lined up one above the other.
total
What you get when you add numbers together.

Watch out

Try it

  1. 72 + 85 + 48 + 26 = ?
  2. ? = 15 + 98 + 16 + 71
  3. 47 + 56 + 18 + 37 = ?
Answers: 1. 231 · 2. 200 · 3. 158
For grown-upsAsk your child to look for pairs that make ten before adding, like 6 and 4. It saves counting.
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