Add or subtract to solve each equation.
2 1/5 + 1 8/9
2 1/3 - 4 7/9
2007-11-01 10:25:00 · 18 answers · asked by greekfoodfestival10 2 in Science & Mathematics ➔ Mathematics
2 1/5 + 1 8/9
2 9/45 + 1 40/45
3 49/45
=4 4/45
2 1/3 - 4 7/9
2 3/9 - 4 7/9
= -2 4/9
2007-11-01 10:30:35 · answer #1 · answered by kfinn360 2 · 0⤊ 0⤋
OK
The key is to get "like" denominators.
2 1/5 + 1 8/9 = 2 9/45 + 1 40/45
=3 49/45
4 4/45
===========
2 1/3 - 4 7/9 = 2 3/9 - 4 7/9 = 1 12/9 - 4 7/9
- 3 5/9
Hope that helps.
2007-11-01 17:31:09 · answer #2 · answered by pyz01 7 · 0⤊ 0⤋
Split up the whole number and the fraction.
2+1=3
1/5+8/9 (find the LCD) which is 45.
9/45+40/45=49/45 now just divide 45 into 49 which is 1 4/45 now add that to the whole number 3+1 4/45= 4 4/45. Most teachers don't prefer this method, but it is much simpler.
2007-11-01 17:33:12 · answer #3 · answered by Anonymous · 0⤊ 0⤋
4 4/45 and 7 1/9
2007-11-01 17:33:00 · answer #4 · answered by charlie e 2 · 0⤊ 0⤋
2 1/5 + 1 8/9
= 11/5 +17/9
=99/45 + 85/45 = 184/45 = 4 4/45
2 1/3 - 4 7/9
= 7/2 - 43/9
= 63/18 - 86/18 = -23/18 = -1 5/18
2007-11-01 17:32:25 · answer #5 · answered by ironduke8159 7 · 0⤊ 1⤋
21/5 + 18/9 = 189/45+ 90/45 = 270/45= 6
21/3 - 47/9 = 63/9 - 47/9 = 16/9
there u go. u have to find a number that both numbers on the bottom may be divided by. i think its called a common denominator (like 45 in the first one and 9 in the second)
2007-11-01 17:38:06 · answer #6 · answered by River 2 · 0⤊ 0⤋
4 4/45
-2 1/3
2007-11-01 17:31:05 · answer #7 · answered by dorkychic 4 · 0⤊ 0⤋
1. 4 4/9
2. 2 4/9
2007-11-01 17:30:36 · answer #8 · answered by lotu20000 2 · 0⤊ 0⤋
Hint:
use 45ths and 27ths
1/5 = 9/45
2007-11-01 17:29:07 · answer #9 · answered by Doug 5 · 0⤊ 0⤋
1. 24/5
2. -22/9
2007-11-01 19:07:34 · answer #10 · answered by I Need Help 4 · 0⤊ 0⤋