Finding one more and one less using representations | Maths

Starter quiz

Which of the following comparative sentences is true for these blocks?
- B has the same number of blocks as A
- B has fewer blocks than A ✓
- C has more blocks than A and B ✓
- A has more blocks than C
Which of the following comparative sentences is true for these blocks?
- A and C have the same number of blocks
- A has 1 more block than C ✓
- B has one fewer block than C ✓
- B has more blocks than C
Which comparative sentence is true for this number track?
- A is more than B
- B is equal to A
- A is not equal to B ✓
Which comparative sentence is true for this number track?
- A is less than B ✓
- B is less than A
- A and B are equal
What are the numbers represented here?
- 12 and 13
- 13 and 14
- 14 and 15 ✓
- 15 and 16
What is the missing number here?
- 9
- 10 ✓
- 11
- 12

What number comes before 13 when you are counting to 20?
- '12' ✓
What number comes after 16 when you count from 20 back to zero?
- 17
- 16
- 15 ✓
- 14
What do you notice about these sticks of cubes?
- 15 is the shortest stick of cubes ✓
- The biggest stick of cubes has 17 bricks ✓
- The middle stick of cubes has 15 bricks
- 16 is one more than 15 ✓
- 16 is one less than 15
How many beads are there on the first bead string?
- 14 ✓
- 16
- 15
Which bead string is one more than 15?
- The top one
- The bottom one ✓
- I'm not sure
Which bead string is one less than 20?
- The top one
- The bottom one ✓
- Neither

Loading worksheet ...

Loading presentation ...

Getting numbers in the wrong order when completing the stem sentences with one more and one less.

Use the representations to identify and support understanding of which value is one less and which is one more.

One more - The next number in the count is one more than the number before and there will be one more object in the set.
One less - The previous number in the count is one less than the next number and there will be one fewer object in the set.