# Adding two 3-digit numbers (regrouping in one column)

## Lesson details

### Key learning points

1. In this lesson, we will build on our knowledge of partitioning and estimating and introduce column addition.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
What is 554 rounded to the nearest 10?
50
500
560
Q2.
Does this look like a good estimate? 720 - 30 = 500
yes
Q3.
Does this look like a good estimate? 575 - 159 = 415
No
Q4.
What is an estimated answer here? 604 - 350 =
300
550
600
Q5.
What is this number rounded to the nearest 10? 996
2000
900
990

## Exit quiz

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### 5 Questions

Q1.
89 + 5 =
104
84
90
Q2.
Which of these calculations requires regrouping?
Correct answer: 190 + 20 =
200 + 700 =
230 + 620 =
800 + 100 =
Q3.
105 + 106 =
1011
110
201
Q4.
234 + 372 =
506
6106
616
Q5.
520 + 634 =
10054
1054