Subtracting as Adding the Opposite, and Distance
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Subtracting as Adding the Opposite, and Distance
Subtracting rational numbers as adding the opposite, Grade 7: pairs to judge, subtractions of integers, decimals, and fractions with signs, and the distance between two integers or decimals as the absolute value of their difference, in two stories too. With an answer key.
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- Skill
- Integers Worksheets
- Pages
- 1
- Last updated
- Time
- About 20 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Place positive and negative numbers on a number line, compare them and find absolute value, then add, subtract, multiply and divide integers, using the number line and the sign rules.
Reviewed by Mr. Daniel Carter, Teacher. How we check worksheets
How to use this sheet
- Keep a number line from −20 to 20 beside the sheet for every problem the child is unsure of.
- Have the child say the problem as a story, such as the temperature or money owed.
- For multiplying and dividing, have the child decide the sign first, then work out the number.
Common mistakes
- Thinking −8 is greater than −3 because 8 is greater than 3. On the number line, −8 is further left, so it is less.
- Using the multiplying sign rule for adding, so −3 + −5 becomes 8. Two negatives added make a bigger negative: −8.
- Dropping the sign when subtracting a negative, so 4 − (−2) becomes 2. Subtracting a negative is adding: 6.
