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Gyaan Maths
CBSE · Class 6-12
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Class 7 · Ganita Prakash
Unit 10 · Class 7Ganita Prakash
Operations with Integers
Advanced integer arithmetic: multiplication, division, powers.
Lessons
3 concepts
1
Sign Rules
Multiplication: same signs positive, different signs negative. Division follows same.
(
−
15
)
÷
3
=
−
5
(-15)\div 3 = -5
(
−
15
)
÷
3
=
−
5
.
2
Powers of Negatives
(
−
2
)
3
=
−
8
(-2)^3 = -8
(
−
2
)
3
=
−
8
(odd power).
(
−
2
)
4
=
16
(-2)^4 = 16
(
−
2
)
4
=
16
(even power).
3
BODMAS with Integers
Apply BODMAS carefully with signs:
−
5
−
(
−
3
)
×
2
=
−
5
−
(
−
6
)
=
−
5
+
6
=
1
-5 - (-3)\times 2 = -5 - (-6) = -5 + 6 = 1
−
5
−
(
−
3
)
×
2
=
−
5
−
(
−
6
)
=
−
5
+
6
=
1
.
Skills to practise
Skill · medium
Operations with Integers — Practice