Subtract the sum of -5/6 & 4/5 from the sum of -3/5 & 7/15 .
Answers
Answer:
1
10
Step-by-step explanation:
Check out the answer.
Step-by-step explanation:
These questions are just evil! It’s a game of common denominators… you can tell it’s evil because the problem definition chose a “7” on purpose when they could’ve done 3/4 or something instead of 5/7 and it’d save on all of the “well what’s the lowest common multiple of 7 and 12…”
To save time, just find that multiple, if I’m not mistaken it’s 84. Multiple every fraction by X / X such that you get an 84. For example, for 5/7, divide 84 by 7 to get 12, so multiply that fraction by 12/12 (which is 1, not changing the number) yielding -60/84 (this is the same number as 5/7, just written with respect to 84ths, just like percents are just fractions with the denominator of 100. Per cent, makes enough sense right?
-5/7 + -8/3 is just -60/84 + -224/84 = –284/84
5/2 + -11/12 becomes 210/84 + -77/84 = 133/84
The wording is important “subtract the [] from the []” so we know to use the second sum as the base and subtract the former sum.
133/84 - (-284/84) = 417/84 = 139/28