???
20
To add/subtract fractions you need to bring both to a common denominator, then add/subtract the numerators(top) . e.g. 3 2/3 - 2 1/5 Convert to improper fractions. 11/3 - 11/5 Brinf to a common denomiator [11(5) - 11(3)] / (3 x 5) [55 - 33] / 15 [22] / 15 = 1 7/15 For addition , it is the same process , but add the numerators ( 55+ 33 = 88]
does how many mean add or subtract
-5 and +3
5 + 8 + 2 = 15. 15 / 3 = 5 All you have to do is add the numbers, then divide the answer by how many numbers you added.
By the signs: 2+2(Add) 2-2(Subtract) +=add -=subtract
you add the numbers together than divide that by 2, after that you add how many numbers there are then subtract 2
1. Subtract 25 2. Then subtract 6 3. Then subtract 12 4. Then subtract 2 5. Then subtract 10 6. Then subtract 15 7. Then subtract 7 8. Then add 3 X 1/2 9. Then add 8
20
26
I don’t know
The pair of numbers are 15 and 2, or -2 and -15 15 - 2 = 13 15 x 2 = 30 -2 - (-15) = -2 + 15 = 13 (-2)(-15) = 30
3
20
22 and 18
50+50+(11-1-10)*(2+5+15+35)
you subtract the top 2 numbers and then leave the denominators the same like: 7/8-4/8=3/8. Get it?