In this lesson, we will use partitioning to add and subtract large integers, both where regrouping is required and where it is not needed.
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The strategy involves rounding numbers to get an approximate answer.
Correct answer: The strategy involves rounding part of an equation to the nearest multiple of 10, 100, 1000, 10 000 or 100 000. Then, adjust for this rounding afterwards.
The strategy involves rounding part of an equation to the nearest multiple of 10, 100, 1000, 10 000 or 100 000. Then, adjust for this rounding afterwards.
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
Correct answer: 57 698
57 698
57 798
57 898
Q3.
3. Use 'rounding and adjusting' to solve: 6880 - 2990 =
1890
Correct answer: 3890
3890
4890
5890
Q4.
4. Use 'rounding and adjusting' to solve: 17 456 + 1980 =
19 136
19 236
19 336
Correct answer: 19 436
19 436
Q5.
5. Use 'rounding and adjusting' to solve: 215 678 + 3800 =