Online Test — Rational Numbers
10 Questions • 20 min • Chapter MCQ
20:00
Question 1 of 10
easy
What is (-15) + (+8)?
-23
-7
+7
+23
Explanation: Different signs: subtract 15-8=7, sign of bigger absolute value (15) is negative, so -7.
Question 2 of 10
easy
(-12) - (-7) = ?
-19
-5
+5
+19
Explanation: (-12) + (+7) = -5
Question 3 of 10
medium
A submarine is at -40 m. It dives 25 m deeper. New position?
-65 m
-15 m
+15 m
+65 m
Explanation: -40 + (-25) = -65 m
Question 4 of 10
easy
What is |-9| + |+4|?
-13
-5
+5
+13
Explanation: |−9|=9, |+4|=4, 9+4=13
Question 5 of 10
medium
The temperature falls from 7°C to -3°C. What is the change?
-10°C
-4°C
+4°C
+10°C
Explanation: -3 - 7 = -10°C
Question 6 of 10
medium
(-6) + (-2) + (+10) = ?
-18
-2
+2
+18
Explanation: (-8) + 10 = 2
Question 7 of 10
medium
Which is greater: (-8)+3 or (-5)+(-1)?
First
Second
Equal
Cannot say
Explanation: First = -5, Second = -6. Since -5 > -6, the first expression is greater.
Question 8 of 10
medium
A stock price changed from -$2 to +$5. What is the net change?
-$7
-$3
+$3
+$7
Explanation: 5 - (-2) = 7, net change = +$7
Question 9 of 10
medium
(-4) + x = 9. Find x.
-13
-5
+5
+13
Explanation: x = 9 - (-4) = 9 + 4 = 13
Question 10 of 10
medium
At 8 AM temperature = -5°C. At 3 PM it is 12°C. Total rise?
-17°C
-7°C
+7°C
+17°C
Explanation: 12 - (-5) = 17°C total rise