Adding Fractions w/ unlike denominators
2/3 + 1/4
11/12
1/3 - 1/4
1/12
Round each fraction to 0, 1/2, or 1 to estimate the total
2/5 + 7/10
0 + 1 = 1
1/2 + 1/4 - 1/8
1/2 + 1/4 = 2/4 + 1/4 = 3/4
3/4 - 1/8 = 6/8 - 1/8 = 5/8
Answer is 5/8
Betty mixed 1/6 pound of peanuts with 1/3 pound of raisins. How much mix did Betty have in all?
1/6 + 1/3 = 1/6 + 2/6 = 3/6 or 1/2 pound
3/4 + 2/3
17/12
2/3 - 1/5
7/15
Round each fraction to 0, 1/2 , or 1 then estimate the answer
7/8 - 2/4
1 - 1/2 = 1/2
5/6 - (1/4 + 1/3)
1/4 + 1/3 = 3/12 + 4/12 = 7/12
5/6 - 7/12 = 10/12 - 7/12 = 3/12
Answer is 3/12
Jill did aerobics for 3/5 hour then lifted weights for 1/3 hour. How long did she exercise for in total?
3/5 + 1/3 = 9/15 + 5/15 =14/15 hour
4/5 + 3/4
31/ 20
1/2 - 1/5
3/10
Round each fraction to 0, 1/2, or 1, then estimate the answer
7/8 + 1/12
1 + 0 = 1
If I had 1/3 of a cake and you had 1/2 of the cake. How much did we have all together? How much was left for everyone else?
1/3 + 1/2 = 2/6 + 3/6 = 5/6
We had 5/6 of the cake.
6/6 - 5/6 = 1/6 1/6 is left for everyone else.
Justin used 3/4 pound of broccoli to make a stir-fry and 9/10 pound of broccoli to make cheddar broccoli soup. How much broccoli did he use all together?
3/4 + 9/10 = 15/20 + 18/20 = 33/20 pounds
6/7 + 5/6
71/ 42
4/5 - 2/3
2/15
Round each fraction to 0, 1/2, or 1, then estimate the answer
4/9 + 1/6
1/2 + 0 = 1/2
(7/20 + 1/5) - 3/10
7/20 + 1/5 = 7/20 + 4/20 = 11/20
11/20 - 3/10 = 11/20 - 6/20 = 5/20
Answer is 5/20 or 1/4 (they are equivalent)
Matt jogged 1/2 of a mile. Thomas jogged 5/8 of a mile. How much farther did Thomas jog than Matt?
5/8 - 1/2 = 5/8 - 4/8 = 1/8
Answer - he jogged 1/8 of a mile farther
1/2 + 1/3
5/6
5/7 - 1/3
8/21
Round each fraction to 0, 1/2, or 1, then estimate the answer
5/12 - 1/6
1/2 - 0 = 1/2
Sam only gets a small amount of screen time on weekends. He lost some of it for poor choices so now only has 7/8 of his original time left for the weekend.
He used 1/3 on Saturday morning and 1/4 on Saturday afternoon. How much does he have left for Sunday?
7/8 - (1/6 + 1/4)
1/6 + 1/4 = 2/12 + 3/12 = 5/12 used
7/8 - 5/12 = 21/24- 10/24= 11/24
Answer: He has 11/24 of his time left.
At 2 P.M. Todd noticed he had 7/8 power left on his smartphone. At 5 P.M. He had 2/3 power left. How much power did Todd use between 2 P.M. and 5 P.M.?
7/8 - 2/3 = 21/24- 16/24 = 5/24 power