Question

1} Verify communicative of addition of rational numbers for each of the following pairs if rational numbers
1)-11/5 and 4/7
2)4/9 and 7/-12
3)-3/5 and -2/-15 ​

Answer 1

Answer

1, -11/5+4/7=. take LCM of 5and7

=-11×7+4×5/35

= -77+20/35

= -57/35

2, 4/9+7/-12. = take LCM of 9 and 12

• = 4×4+7×3/36
• =16+21/36
• =37/-3

3,-3/5+-2/-15= take LCM of 5 and 15

• = -3×3+-2×1/15
• =-9+-2/-15=-11/-15