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Byju's Answer
Standard VII
Mathematics
Addition of Rational Numbers
Simplify:iii ...
Question
Simplify:
iii)
5
4
−
7
6
−
−
2
3
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Solution
Given:
5
4
−
7
6
−
−
2
3
LCM of
(
3
,
4
and
6
)
=
12
∴
5
4
−
7
6
−
−
2
3
=
5
×
3
4
×
3
−
7
×
2
6
×
2
−
−
2
×
4
3
×
4
=
15
12
−
14
12
−
−
8
12
=
15
−
14
−
(
−
8
)
12
=
9
12
=
3
4
Hence,
5
4
−
7
6
−
−
2
3
=
3
4
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0
Similar questions
Q.
Simplify:
(i)
-
3
2
+
5
4
-
7
4
(ii)
5
3
-
7
6
+
-
2
3
(iii)
5
4
-
7
6
-
-
2
3
(iv)
-
2
5
-
-
3
10
-
-
4
7
(v)
5
6
+
-
2
5
-
-
2
15
(vi)
3
8
-
-
2
9
+
-
5
36
Q.
Mark (✓) against the correct answer
5
4
-
7
6
-
-
2
3
=
?
(a)
3
4
(b)
-
3
4
(c)
-
7
12
(d)
7
12
Q.
Mark the correct alternative in each of the following:
5
4
-
7
6
-
-
2
3
=
(a)
3
4
(b)
-
3
4
(c)
-
7
12
(d)
7
12
Q.
State, whether the square of the following numbers is even or odd?
(i) 23 (ii) 54
(iii) 76 (iv) 75
Q.
Question 19
Factorised form of
23
x
y
−
46
x
+
54
y
−
108
is
a)
(
23
x
+
54
)
(
y
−
2
)
b)
(
23
x
+
54
y
)
(
y
−
2
)
c)
(
23
x
y
+
54
y
)
(
−
46
x
−
108
)
d)
(
23
x
+
54
)
(
y
+
2
)
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Addition of Rational Numbers
Standard VII Mathematics
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