The Year 4 Round to the Nearest 100 PowerPoint guides both teachers and children through the lesson, including use of the varied fluency, reasoning and problem solving, deeper reasoning and scaffolded resources. Key learning information about this step:
Key Vocabulary
rounding: When a number is replaced with an approximated value. Numbers are often rounded to the nearest 10, 100 or 1,000.
multiple: A product of one number multiplied by another number. For example: multiples of 10 are the products of numbers multiplied by 10.
number lines: A horizontal or vertical line which has numbers placed at equal points. Number lines can be used to show either positive or negative numbers. Most number lines begin at 0.
midpoint: The point on a number line that is exactly halfway between the start and end values.
Varied Fluency
Knowledge Organiser
• Designed to support all children via key information and examples.
For the purple sections of the four levels, copy and paste these from the first sheet of the varied fluency resource.
Scaffolded Examples
Rounding a three-digit and a four-digit number on a number line and reading place value counters.
Support
• Q1: rounding a three-digit number on a number line with extra labels given.
• Q2: sorting counters and a number into a Carroll diagram, with a reminder given.
• Q3: rounding a four-digit number on a number line with extra labels given.
Core
• Q1: rounding a three-digit number on a number line with the midpoint labelled.
• Q2: sorting a Roman numeral, counters and a number into a Carroll diagram.
• Q3: rounding a four-digit number on a number line with the midpoint labelled.
Stretch
• Q1: rounding a three-digit number with only the end values labelled.
• Q2: sorting a Roman numeral, counters and a number written in words into a Carroll diagram.
• Q3: rounding a four-digit number with only the end values labelled.
Reasoning and Problem Solving
Support
• Q1: Reasoning - rounding two 3-digit numbers, finding the total and explaining whether the total is always greater or less than the real total, with the two multiples of 100 given.
• Q2: Reasoning - explaining whether a character has rounded a three-digit number to the nearest 100 correctly.
• Q3: Problem Solving - using four digit cards to make as many three-digit numbers as possible that round to a given multiple of 100, with no card used twice.
Core
• Q1: Reasoning - rounding three 3-digit numbers, finding the total and explaining whether the total is always greater or less than the real total.
• Q2: Reasoning - explaining whether a character has rounded a four-digit number to the nearest 100 correctly.
• Q3: Problem Solving - using five digit cards to make as many three-digit numbers as possible that round to a given multiple of 100, with no card used twice.
Stretch
• Q1: Reasoning - rounding four 3-digit numbers, finding the total, comparing it to the real total and explaining whether that example can be generalised as a rule for all examples.
• Q2: Reasoning - explaining a rounding of a number below 100 and a number where the tens digit is 4.
• Q3: Problem Solving - using five digit cards, which may be reused, to make as many odd or even three-digit numbers as possible that round to a given multiple of 100.
Deeper Reasoning
The questions in this set focus on problem solving using rounding to deepen understanding in rounding 3-digit numbers to the nearest 100.
