a) Which of the following sums has a positive sign?
TRUE 😊 \(40 + (-18) = 22\) (positive result)
FALSE 😢 This sum doesn't have a positive result
Explanation:
To find which sum has a positive result:
1. \(19 + (-26) = -7\) (negative)
2. \(-35 + 17 = -18\) (negative)
3. \(-25 + (-12) = -37\) (negative)
4. \(40 + (-18) = 22\) (positive)
Only option d) gives a positive result.
To find which sum has a positive result:
1. \(19 + (-26) = -7\) (negative)
2. \(-35 + 17 = -18\) (negative)
3. \(-25 + (-12) = -37\) (negative)
4. \(40 + (-18) = 22\) (positive)
Only option d) gives a positive result.
MR/Nasef.N
b) Which of the following is equivalent to the subtraction operation: \(-5 - (-8)\)?
TRUE 😊 \(-5 - (-8) = 3\) and \(8 - 5 = 3\)
FALSE 😢 This is not equivalent to \(-5 - (-8)\)
Explanation:
\(-5 - (-8)\) can be simplified as:
\(-5 + 8 = 3\)
Now check the options:
1. \(5 - 8 = -3\)
2. \(8 - 5 = 3\) (matches our result)
3. \(5 + 8 = 13\)
4. \(-5 - 8 = -13\)
Only option b) gives the same result.
\(-5 - (-8)\) can be simplified as:
\(-5 + 8 = 3\)
Now check the options:
1. \(5 - 8 = -3\)
2. \(8 - 5 = 3\) (matches our result)
3. \(5 + 8 = 13\)
4. \(-5 - 8 = -13\)
Only option b) gives the same result.
MR/Nasef.N
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