Adding and subtracting multiples of 100 to/from 3-digit numbers
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.
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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