Question

add the following pairs of 4/7,-11/28 .The answer is 5/28 please tell step.​

Answer 1

Answer:

5/28

Step-by-step explanation:

$\frac{4}{7} + ( - \frac{11}{28} )$

take L.C.M of 7 & 28 as:

7 | 7 — 28

4 | 1 — 4

| 1 — 1

7×4 = 28 = L.C.M

NOW, we see that by multiplying the denominator of each term with what number gives us L.C.M.

So, in 4/7 , 7 ×4 = 28 , and for -11/28 , 28 × 1= 28

hence, we multiply the numerator with that number i.e 4 and 1 respectively:

$\frac{4(4) - 11(1)}{ 28}$

= (16 - 11 )/ 28

= 5/28