Use knowledge of the composition of 100 to multiply and divide by 100 in different ways
Lesson details
Learning outcome
I can use knowledge of the composition of 100 to multiply and divide by 100 in different ways
Key learning points
- 100 is ten groups of ten or ten times ten.
- Multiplying by 100 is equivalent to multiplying by 10 and then multiplying by 10 again.
- Each time you multiply by 10 the digits move one place to the left in the place value chart.
Keywords
Placeholder - A placeholder is where we use the digit 0 to hold a place in a number and maintain place value.
Digit - A digit is one of the symbols of a number system. In our number system we use the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9
Common misconception
Pupils may not have much experience in using a Gattegno chart.
Consider pre-teaching for children who lack confidence using Gattegno chart.
Teacher tip
As much as possible and through prompting and discussion, get the pupils to make the generalisation that multiplying by 100 is equivalent to multiplying by 10 and then multiplying by 10 again as 10 multiplied by 10 is equal to 100
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is the number being shown on the Gattegno chart?
Q2.What is the number being shown on the Gattegno chart?
Q3.What is the number being shown on the place value chart?
Q4.What is the number being shown on the place value chart?
Q5.What is the missing number in the following equation? 10 × 8 = 70 +
Q6.What is the missing number in the following equation?
3 × 100 = 150 ×
Assessment exit quiz
6 Questions
Q1.What is the equation being represented on this Gattegno chart?
Q2.What is the equation being represented on this Gattegno chart?
Q3.Match the equivalent expressions.
2 × 10 × 10
20 × 100
2,000 ÷ 10 ÷ 10
200 ÷ 10 ÷ 10
Q4.Match the equivalent expressions.
12 × 10 × 10
8 × 100
8,400 ÷ 10 ÷ 10
500 ÷ 10 ÷ 10
Q5.What is the missing number in the following equation?
11 × 10 × 10 = 11 ×
Q6.What is the missing number in the following equation? 3,400 ÷ 100 = 3,400 ÷ ÷ 10
To help you plan your 4 maths lesson on: Use knowledge of the composition of 100 to multiply and divide by 100 in different ways, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 4 maths lesson on: Use knowledge of the composition of 100 to multiply and divide by 100 in different ways, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Understand what happens when a number is multiplied or divided by 10 and 100 unit, dive into the full primary maths curriculum, or learn more about lesson planning.