New
New
Year 3
Count forwards and backwards within 3-digits
I can count forwards and backwards using 3-digit numbers.
New
New
Year 3
Count forwards and backwards within 3-digits
I can count forwards and backwards using 3-digit numbers.
Lesson details
Key learning points
- Place value helps us count on and back in 10s and 100s.
- Place value helps us to know which digits change as we cross the 100s or 10s boundaries.
- The 1s and 10s digits don’t change when you add a 100 to or subtract 100 from a 3-digit number.
Common misconception
Pupils may struggle to cross 100s boundaries when adding 10s.
Base ten blocks can help with this concept. It also helps if children's attention is drawn towards the patterns in the number system.
Keywords
100s boundary - The 100s boundary is the point at which the numbers change into 100s numbers or from one set of hundreds to another.
Pattern - A pattern is a repeated set of numbers, shapes or objects.
This lesson covers counting in 10s and 100s. Pupils may find base ten blocks helpful in understanding why digits change or don't change when 10 or 100 is added or subtracted.
Teacher tip
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
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6 Questions
Q1.
What number comes next in the sequence?
Q2.
Sofia is counting forwards in 10s from 0. Put these numbers in the order that she will say them in.
Q3.
Which of these statements is correct?
“10 more than 55 equals 45”
“10 more than 55 equals 56”
Q4.
Match the statement with the correct answer.
53
77
31
Q5.
What number is represented by the base ten blocks?
Q6.
Which chart represents the largest 3-digit number?
b
c
Exit quiz
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6 Questions
Q1.
What number comes next in this sequence? 370, 380, 390,
Q2.
What is the missing number in this sequence?
Q3.
What are the missing numbers in this row and column?
430 and 560
460 and 530
340 and 650
Q4.
Match the statement to the correct answer.
570
771
400
Q5.
100 more than a number is 776. What is the number?
Q6.
Tim is 100 cm shorter than Jack. If Tim is 478 cm tall, what is Jack’s height in cm?
373 cm
483 cm
474 cm