Year 3
Adding and subtracting multiples of 100 to/from 3-digit numbers
Year 3
Adding and subtracting multiples of 100 to/from 3-digit numbers
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Lesson details
Key learning points
- In this lesson, we will use known number facts in order to mentally add and subtract multiples of 100 to and from 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental addition and subtraction more efficient.
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.
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5 Questions
Q1.
When we subtract the number we started with gets...
bigger
Q2.
356 - 40 = 326 True or false?
True
Q3.
673 - 60 =
623
633
666
Q4.
532 - 40 =
482
502
600
Q5.
300 - 60 =
320
360
440
5 Questions
Q1.
When we subtract the original number always gets bigger? True or false?
True
Q2.
Is this calculation correct? 456 - 300 = 200
Maybe
Yes
Q3.
567 + 300 =
100
267
800
Q4.
212 - 100 =
100
12
200
Q5.
515 + 600 =
1015
115
915