Year 5
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Lesson details
Key learning points
- In this lesson, we will use partitioning to add and subtract large integers, both where regrouping is required and where it is not needed.
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.
What is the 'round and adjust' strategy?
The strategy involves rounding numbers to get an approximate answer.
The strategy involves using partitioning to add and subtract.
The strategy involves using the column method to add and subtract.
Q2.
2. Use 'rounding and adjusting' to solve: 53 700 + 3998 =
57 598
57 798
57 898
Q3.
3. Use 'rounding and adjusting' to solve: 6880 - 2990 =
1890
4890
5890
Q4.
4. Use 'rounding and adjusting' to solve: 17 456 + 1980 =
19 136
19 236
19 336
Q5.
5. Use 'rounding and adjusting' to solve: 215 678 + 3800 =
217 478
218 478
220 478
5 Questions
Q1.
Which equation demonstrates how the number 346 000 can be partitioned?
30 000 + 4000 + 600
300 + 40 + 6
3000 + 400 + 60
Q2.
2. Use partitioning to solve the equation: 723 000 + 15 000 =
728 000
748 000
758 000
Q3.
3. Use partitioning to solve the equation: 456 000 - 132 000 =
234 000
235 000
325 000
Q4.
4. Use partitioning to solve the equation: 158 000 + 26 000 =
164 000
174 000
178 000
Q5.
5. Use partitioning to solve the equation: 738 000 - 156 000 =
482 000
682 000
782 000