Question

2/5×(-1/9) +2/5×(-3/7)
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Answer 1

Answer:

Page No 21:

Question 1:

Compare the fractions:

(i)

5

8

and

7

12

(ii)

5

9

and

11

15

(iii)

11

12

and

15

16

ANSWER:

We have the following:

(i)

5

8

and

7

12

By cross multiplication, we get:

5 × 12 = 60 and 7 × 8 = 56

However, 60 > 56

∴

5

8

>

7

12

(ii)

5

9

and

11

15

By cross multiplication, we get:

5 × 15 = 75 and 9 × 11 = 99

However, 75 < 99

∴

5

9

<

11

15

(iii)

11

12

and

15

16

By cross multiplication, we get:

11 × 16 = 176 and 12 × 15 = 180

However, 176 < 180

∴

Answer 2

Step-by-step explanation:

2/5(-1/9-3/7)

2/5(7-27/63)

2/5(-20/63)

8/63