Add three addends efficiently by finding two addends that total 10
Lesson details
Learning outcome
I can use my knowledge of number pairs to 10 to add three addends efficiently.
Key learning points
- The order of the addends can change and the sum stays the same.
- When adding three addends, it is efficient to first find two addends that sum to 10
- ___ add ___ is equal to 10 Then, 10 add ___ is equal to ___
Keywords
Addends - Any of the numbers that are added together.
Number pairs - Two numbers that sum to make 10
Efficient - Not wasting time or effort. An efficient strategy is one we can carry out easily.
Common misconception
If children record incorrectly, they could re-add an addend that has already been used to make a pair to 10
Carefully model how to record thinking, rewriting the new equation inclusive of 10 underneath.
Teacher tip
When adding three addends, always encourage children to see if they can find two addends that sum to 10 before adding the third addend. Outside of the lesson, build speed in recalling the pairs to 10 through quizzing and games.
Licence
except where otherwise stated. See Oak's terms & conditions (Collection 2).Lesson video
Loading...
Prior knowledge starter quiz
6 Questions
Q1.Match the number pairs to 10
9
7
5
6
8
Q2.'Make 10' by adding the third addend.
+ 6
+ 4
+ 2
+ 5
Q3.Match each double fact to the correct answer.
10
12
18
14
16
Q4.Find the sum of the three addends and compare this to 10
greater than 10
less than 10
equal to 10
Q5.Which step has been taken in solving this equation?
Q6.Solve this equation using an efficient strategy.
1 + 4 + 5 =
Assessment exit quiz
6 Questions
Q1.Which number pairs are not pairs to 10?
Q2.Which expressions include two addends that are a number pair to 10?
Q3.Which are correct?
Q4.Which two addends are a number pair to 10?
Q5.Look at this equation and complete the stem sentence.
5 + 5 is equal to 10, then 10 + 4 is equal to
Q6.Look at the part-part-whole model.
Say the stem sentence aloud to find the sum
___ add ___ is equal to 10, then 10 add ___ is equal to
To help you plan your 2 maths lesson on: Add three addends efficiently by finding two addends that total 10, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 2 maths lesson on: Add three addends efficiently by finding two addends that total 10, 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 1 maths lessons from the Calculating within 20 unit, dive into the full primary maths curriculum, or learn more about lesson planning.