GSEB Solutions for Class 7 Mathematics – Integers (English Medium)
GSEB SolutionsMathsScience
Exercise
Solution 1:
- The absolute value of 27 = |27| = 27
- The absolute value of (-15) = |-15| = 15
- The absolute value of 0 = |0| = 0
- The absolute value of (-35) = |-35| = 35
- The absolute value of 24 = |24| = 24
Solution 2:
(1) (-4) + (-3)
= (-4) – 3
= (-7)
Hence, (1) → (3)
(2) (-5) + 6
= 1
Hence, (2) → (6)
(3) (-7) – 5
= -12
Hence, (3) → (2)
(4) (-5) + (-4)
= (-5) – 4
= -9
Hence, (4) → (7)
(5) (-4) × 4
= -16
Hence, (5) → (5)
(6) (-3) × (-5)
= 15
Hence, (6) → (4)
(7) 5 × 0
= 0
Hence, (7) → (1)
Solution 3:
Practice – 1
Solution 1:
- The absolute value of 17 = |17| = 17
- The absolute value of (-18) = |-18| = 18
- The absolute value of 0 = |0| = 0
- The absolute value of (-25) = |-25| = 25
- The absolute value of 16 = |16| = 16
Solution 2:
1. (-5) + 6 = 1
6 + 6 = 12
(-4) + 6 = 2
(-12) + 6 = (-6)
2. 8 + (-5) = 8 – 5 = 3
(-2) + (-5) = (-2) – 5 = (-7)
(-4) + (-5) = (-4) – 5 = (-9)
10 + (-5) = 10 – 5 = 5
3. (-5) + (-5) = (-5) – 5 = (-10)
6 + (-5) = 6 – 5 = 1
(-4) + (-5) = (-4) – 5 = (-9)
(-12) + (-5) = (-12) – 5 = (-17)
4. 7 – (-5) = 7 + 5 = 12
(-8) – (-5) = (-8) + 5 = (-3)
(-4) – (-5) = (-4) + 5 = 1
6 – (-5) = 6 + 5 = 11
Solution 3:
1. 17 + (-12)
= 17 – 12
= 5
2. (-18) + 15
= 15 + (-18)
= 15 – 18
= (-3)
3. 12 – (-18)
= 12 + 18
= 30
4. (-25) + (-15)
= (-25) – 15
= (-40)
5. (-9) – (-8)
= (-9) + 8
= (-1)
6. 14 – 20
= (-6)
Practice – 2
Solution 1:
Positive integer × Positive integer = Positive integer
Negative integer × Negative integer = Positive integer
Negative integer × Positive integer = Negative integer
Positive integer × Negative integer = Negative integer
Positive integer × 0 = 0
Negative integer × 0 = 0
- (-12) × 5 = (-60)
- (-15) × (-10) = 150
- 14 × (-7) = (-98)
- 0 × (-17) = 0
- 20 × 0 = 0
- (-5) × (-8) = 40
- (-24) × 5 = (-120)
- 20 × (-15) = (-300)
- 100 × 0 = 0
- (-15) × (-1) = 15
Solution 2:
Positive integer × Positive integer = Positive integer
Negative integer × Negative integer = Positive integer
Negative integer × Positive integer = Negative integer
Positive integer × Negative integer = Negative integer
Positive integer × 0 = 0
Negative integer × 0 = 0
- (-12) × 5 = (-60)
- (-15) × (-10) = 150
- 14 × (-7) = (-98)
- 0 × (-17) = 0
- 20 × 0 = 0
- (-5) × (-8) = 40
- (-24) × 5 = (-120)
- 20 × (-15) = (-300)
- 100 × 0 = 0
- (-15) × (-1) = 15