Grade 6 · Maths · Lessons
Lining up the point, bigger numbers
•point➕add➖take away0️⃣zeros
Line up the point.The big ideaLine up the points. Fill the gaps with zeros. Work each place from the right.
How it works
Line up the points. Fill the gaps with zeros.
Work each place from the right.
Put the point straight down in the answer.
Example 1: Adding
- 43.35 + 6.49 = ?
- Line up the points.
- Add hundredths, tenths, ones, tens.
- So the answer is 49.84.
Example 2: Taking away
- 460.1 − 3.25 = ?
- Write 460.1 as 460.10 to line up.
- Break a ten or a one when you need to.
- So the answer is 456.85.
Example 3: Three places
- 1951.455 + 627.721 = ?
- Line up the three decimal places.
- Add from the thousandths.
- So the answer is 2579.176.
Words to know
- decimal point
- The dot between ones and tenths.
- place
- Where a digit sits.
Watch out
- Line up the points, not the right-hand digits.
- Add zeros to fill gaps.
- Estimate to check.
Try it
- 54.8 − 0.69 = ?
- 95 + 56.689 = ?
- 500.818 − 8.015 = ?
Answers: 1. 54.11 · 2. 151.689 · 3. 492.803
For grown-upsAdd prices with cents by lining up the points.