Choosing appropriate addition strategies

In this lesson, we will look at addition equations and decide the best and most efficient strategy we could use to solve them.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What's the same? What's different? 364 + 302 = 666 and 374 + 302 = 676

1/5

Q2.What's the same? What's different? 764 - 204 = 560 and 754 - 204 = 550

2/5

Q3.What's the same? What's different? 3672 + 1474 = 5146 and 3972 + 1474 = 5446

3/5

Q4.If... 362 + 205 = 567 then... 262 + 205 = ?

4/5

Q5.If... 751 - 303 = 448 then... 741 - 303 = ?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What's the same? What's different? 364 + 302 = 666 and 374 + 302 = 676

1/5

Q2.What's the same? What's different? 764 - 204 = 560 and 754 - 204 = 550

2/5

Q3.What's the same? What's different? 3672 + 1474 = 5146 and 3972 + 1474 = 5446

3/5

Q4.If... 362 + 205 = 567 then... 262 + 205 = ?

4/5

Q5.If... 751 - 303 = 448 then... 741 - 303 = ?

5/5

Video

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Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Choosing appropriate addition strategies

Using what we have learnt today, can you answer the following questions?

Q1.Mrs Crane is using the strategy near doubles to solve the following equation: 3014 + 3007 = ... Which of the following near doubles should she use to help her calculate the answer?

1/5

Q2.Mrs Crane is using the strategy near doubles to solve the following equation: 4136 + 4122 = ... Which of the following near doubles should she use to help her calculate the answer?

2/5

Q3.Mrs Crane is using the strategy round and adjust to solve the following: 4543 + 3003 = ... Which of the numbers in the equation should she use to round and adjust?

3/5

Q4.Mrs Crane is using the strategy round and adjust to solve the following: 3783 + 2998 = ... Which of the numbers in the equation should she use to round and adjust?

4/5

Q5.Using the strategy round and adjust, add the following three numbers together: 4001 + 3997 + 2005 =

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Choosing appropriate addition strategies

Using what we have learnt today, can you answer the following questions?

Q1.Mrs Crane is using the strategy near doubles to solve the following equation: 3014 + 3007 = ... Which of the following near doubles should she use to help her calculate the answer?

1/5

Q2.Mrs Crane is using the strategy near doubles to solve the following equation: 4136 + 4122 = ... Which of the following near doubles should she use to help her calculate the answer?

2/5

Q3.Mrs Crane is using the strategy round and adjust to solve the following: 4543 + 3003 = ... Which of the numbers in the equation should she use to round and adjust?

3/5

Q4.Mrs Crane is using the strategy round and adjust to solve the following: 3783 + 2998 = ... Which of the numbers in the equation should she use to round and adjust?

4/5

Q5.Using the strategy round and adjust, add the following three numbers together: 4001 + 3997 + 2005 =

5/5

Lesson summary: Choosing appropriate addition strategies

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