Combine multiplication with addition and subtraction
I can explain which order to complete the multiplication and addition or subtraction elements of a problem, and I know how to write this as an equation.
- Year 6
Combine multiplication with addition and subtraction
I can explain which order to complete the multiplication and addition or subtraction elements of a problem, and I know how to write this as an equation.
Lesson details
Key learning points
- Multiplication can be combined with addition and subtraction.
- When there are no brackets, the multiplication is completed first.
- Where there are brackets, the calculation within the brackets is completed first.
- The order of operations is a set of rules that tells you the order in which you need to solve a written a equation.
Keywords
Efficient - Working efficiently means finding a way to solve a problem quickly whilst also maintaining accuracy.
Equation - An equation is used to show that one number, calculation or expression is equal to another.
Brackets - Brackets are symbols used in pairs to group things together.
Order of operations - The order of operations is a set of rules that tell you which operations have priority over others in an equation.
Common misconception
Children will solve an equation by working from left to right and forget that multiplication needs to be completed before addition or subtraction.
Allow plenty of opportunities for children to practise solving equations that cannot be solved working from left to right. You could highlight the operation symbols to draw children's attention to these before they begin to solve them.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.An equation is used to show that one number, calculation or expression is to another.
Q2.Look at the bar model. Which of these expressions could it represent?
Q3.4 × 3 is equal to ___
Q4.Match the equations to the correct solutions.
Q5.Match the expressions that are equal in value.
Q6.Aisha and Jun want to find the total number of cakes. Aisha calculates 8 + 8 + 8 + 8 + 8 + 8 and Jun calculates 6 x 8 They find the correct number of cakes. Whose method was more efficient?
Assessment exit quiz
6 Questions
Q1.Think about the order of operations. Which of these sentences are correct?
Q2.Which bar model could you use as a representation to help solve this problem? Jun has 3 packs of 20 balloons. Sam has 4 packs of 12 balloons. Who has more balloons, and by how many?
Q3.Look at this problem. I have two packs of 25 stickers. You have three packs of 12 stickers. How many more stickers do I have? Which equation could you use to solve this?
Q4.Use the equation to help solve this problem. A class is organised into five teams of three children and four teams of four children. There are children in the class.
Q5.Match each equation to the correct solution.
