Question

find: 1. 5/63-[-6/21]
2. -3/8-7/11

Answer 1

Answer:

1. 23/63

2. -89/88

Step-by-step explanation:

1. 5/63+6/21

(lcm of 63 &21) 63

5+18/63=23/63

2. (lcm of 8,11)=88

-33-56/88=-89/88

Answer 2

Find :

1) 5/63 - (6/21).

2) -3/8 - 7/11.

Calculation (1)

→ 7 × 3 × 3

→ 63

→ 5/63 - (63) × 3/21 × 3

→ 5/63 - (-18)/63

→ 4 + 18/63

→ 23/63

Calculations (2)

→ 3/8 × 11/11

→ 7/11 × 8/8

→ -33/88 - 56/88

→ -33 - 56/88

→ -89/88