Question

subtract the sum of 1/3 and-8/9from the sum of 4/7 and -5/21​

Answer 1

Answer:

The answer is 8/9.

Step-by-step explanation:

First of all, we add 4/7 and -5/21. The answer is 1/3.

Then, we add 1/3 and -8/9. The answer is -5/9.

Then, we will subtract -5/9 from 1/3. The final answer is 8/9.

Answer 2

Answer:

8/9

Step-by-step explanation:

[4/7+(-5/21)] - [1/3+(-8/9)]

L.C.M of 7 and 21=21 and L.C.M of 3 and 9=9

=[(4×3/7×3)+(-5×1/21×1)] - [(1×3/3×3)+(-8×1/9×1)]

=[12/21+(-5/21)] - [3/9+(-8/9)]

=[12-5/21] - [3-8/9]

=[7/21] - [-5/9]

L.C.M of 21 and 9= 63

[7×3/21×3] - [-5×7/9×7]

=[21/63] - [-35/63]

=21-(-35)/63

Now minus and minus will be cancelled and will form a pluse sign.

=21+35/63

=56/63

=56÷7/63÷7

=8/9