1. © Hamilton Trust Stepping Up Term 3 Week 1 Day 1
Rounding – Objectives
Objective
Round whole numbers to the nearest 10 or
You may need:
Mini whiteboards, students’ books
© Hamilton Trust Stepping Up Term Week 1 Day 1

2. 40 Rounding – Direct Teaching 37
Which tens numbers is 37 between? 37
Which of these is it closer to? 40
We say that ‘37 rounded to the nearest ten is 40’…
© Hamilton Trust Stepping Up Term Week 1 Day 1

3. Rounding – Direct Teaching
Start with 73 and move clockwise to reveal the multiple of 10 that each number rounds to. 70
100 40 70
130
Discuss how a halfway number (e.g. 125) rounds up; anything less (e.g. 42) rounds down.
120
100 90 60 40
© Hamilton Trust Stepping Up Term Week 1 Day 1

4. Rounding – Direct Teaching
Can you mark the following numbers on the line?
493
249
350
625
887
Use animation to move the numbers.
Discuss how a halfway number (e.g. 350) rounds up; anything less (e.g. 249) rounds down.
Which 100s number is each nearest?
© Hamilton Trust Stepping Up Term Week 1 Day 1

5. Rounding – Student Activity
With a partner, choose a multiple of 100 (100 to 1000); write it clearly on your whiteboard.
Hold up your board if the numbers that come up round to your multiple of 100!
289
Use animation to reveal the numbers.
Watch out for students who don’t realise that numbers ending in 50 need to be rounded up when rounding to the nearest 100.
849
550
174
418
539
857
418
726 53
© Hamilton Trust Stepping Up Term Week 1 Day 1

6. Rounding – Individual Practice
Can you work through two of these three sections?
Round to nearest 10:
Round to nearest 100:
Round to nearest 10
and nearest 100:
726
726
123
123
256
963
950
950 52 52
755 92
349
349
507
507
315
550
148
148
148
250
250
886
886
Support weaker students by using practical resources, such as dry-wipe number lines.
812
665
229
229
357
567
567
705
© Hamilton Trust Stepping Up Term Week 1 Day 1