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Maths · Grade 6 · Set C
Opposites: Set C
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C
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Goal: 15 min
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Remember: The opposite of a number is the same distance from zero on the other side.

On the number line

1
What is the opposite of the number the dot shows?
2
What is the opposite of −2/3?
3
The opposite of the opposite of the opposite of 8 is .
4
A is at −4 and B is its opposite. Which number is exactly halfway between A and B?
−2402
5
Every number except 0 has an opposite that is a different number.
TrueFalse

Flips and special numbers

6
Which number has an opposite that is bigger than itself?
123.5−0.80
7
The temperature was −9 degrees, then it changed to the opposite number. What is the new temperature?
8
Circle every pair that are opposites.
7 and 1/7−5 and 52 and −3−0.3 and 0.3−4 and −4
9
Join each to its answer.
  1. 1the opposite of −15
  2. 2the opposite of 6.4
  3. 3the opposite of the opposite of −2
  4. 4the opposite of 0
  • A−2
  • B−6.4
  • C0
  • D15
10
−9 and its opposite are marked on the number line. How many units apart are they?

Stretch

11
Which sentence is true about a number and its opposite?
They are on the same side of zeroThey are the same distance from zeroThey are always both negativeThey are always both whole numbers
12
Number the steps to find the opposite of −6.
  • Count how far it is from zero: 6 steps
  • Go the same distance on the other side of zero
  • Stop at 6: that is the opposite
  • Find −6 on the number line
13
Pip says the opposite of −2.5 is −2.5, because it keeps the 2.5. Write how you know Pip is wrong, and the opposite.
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Answer key · Set C
Opposites: Set C
17.5 The dot is at −7.5. Its opposite is the same distance from zero on the right: 7.5.
22/3 Change the side of zero and keep the size: 2/3.
3-8 Flip once to −8, again to 8, and a third time to −8.
40 A and B are the same distance from zero on opposite sides, so zero is in the middle.
5True A number and its opposite are on opposite sides of zero, so they are different. Only 0 is its own opposite.
6−0.8 The opposite of −0.8 is 0.8, which is bigger. The opposite of a positive number is smaller.
79 The opposite of −9 is 9.
8−5 and 5, −0.3 and 0.3 −5 and 5 are each 5 from zero, on opposite sides. −0.3 and 0.3 are each 0.3 away. 7 and 1/7, 2 and −3, and −4 and −4 are not.
91-D, 2-B, 3-A, 4-C One flip changes the side of zero. Two flips bring you back. Zero is its own opposite.
1018 Each is 9 away from zero, on opposite sides: 9 + 9 = 18.
11They are the same distance from zero An opposite is the same distance from zero, on the other side.
122, 3, 4, 1 Same distance, other side.
13Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.