Estimate where 6, 7, 8 and 9 lie on an unmarked number line | Maths

Starter quiz

Which numbers are in the wrong place?

5 and 6

6 and 8

7 and 8

6 and 9 ✓
Which number would be where a is on the number track?

6

7

8 ✓

9
Which number is in the wrong place on the number line?

3

5

7 ✓

8
Which sentences describe the missing number a?

It is one more than 10

It is one less than 10 ✓

It is less than 5

It is greater than 5 ✓
The number at a is ______

'9' ✓
Where would the number 8 go on this number line?

a

b

c ✓

d

Which letter shows where 6 would be on this number line?

a

b ✓

c

d
8 has been placed on the number line. Is it in the right place?

yes

no ✓
Where do you think 8 should be: a, b, c or d?

a

b

c ✓

d
Which of the following is closer to 5?

3 ✓

9
Alex wants to compare 7 and 9. Which sentences are correct?

9 is closer to 10 ✓

7 is closer to 5 ✓

9 is less than 7

7 is less than 9 ✓
Which of these are correct?

6 > 10

6 < 10 ✓

5 < 7 ✓

5 > 7

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The position of numbers can be estimated on unmarked number lines using an understanding of relative size.
The midpoint, five in this case, should be marked to support positioning
We can compare numbers on a number line by looking at how far away from other numbers they are.

Children may find it hard to draw their own number lines.

Place the first, last and midpoint numbers first and use fingers or cubes to space the other numbers out equally.

Estimate - To find a value that is close enough to the right answer, usually with some thought or calculation involved.
Compare - You compare to find out what is the same and what is different. You can compare numbers to find out if one is greater than or less than another.
Midpoint - The middle of something. The point halfway along.
Number line - A line with numbers placed in their correct position.