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Adding and Subtracting Fractions

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by

Josephine Talamantes Castillo

on 28 October 2013

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Transcript of Adding and Subtracting Fractions

Halloween Review
FONTS
Gurtrude's halloween party has an explosion ever 4 minutes. Melinda's halloween party has an explosion ever 5 minutes, and Jack's halloween party has an explosion every 15 minutes. When will all three explosions go off at the same time?
Jonathan has carved 1/2 a pumpkin in 20 minutes. In the next 15 minutes he had carved another 1/4 of the pumpkin. Later on, he had carved 1/9 of the pumpkin until his mom made him take out the trash. Has he finished carving the pumpkin?
A family of bats one day wanted
to feast on mangos and mosquitos.
Their tradition is to eat the same
amount of mosquitos as the mangos. In each mango tree they find 5 mangos, but in each area there are about 12 mosquitos. If they were to eat all of the mosquitos in each area and all the mangos in each tree, what is the smallest amount of mangos and mosquitos they can eat?


Adding and Subtracting Fractions
1. 6 2/3 - 4 3/4 9. 7 1/2 + 8 2/3

2. 3 1/5 - 2 3/4 10. 4 4/5 + 6 7/8

3. 5 3/4 - 3 7/8 11. 6 3/12 + 7 9/10

6. 4 2/5 - 3 4/10 12. 5 1/2 + 5 1/2

7. 7 6/7 - 6 5/6 13. 3 2/3 + 1 9/12

8. 2 1/2 - 1 3/4 14. 8 1/4 + 1 6/5


Miranda a costume designer has 36 bat buttons and 27 pumpkin buttons, and 18 black cat buttons. What is the largest amount of costumes that Miranda can make without having any buttons left over?
Isbella the friendly witch made worm sandwiches for her 3 mummy friends. She started off with a full bucket of 12, made a sandwich for herself using 1/8 of the bucket. For her 3 friends she used another 1/8 for the smallest mummy friend, 1/6 for her biggest mummy friend and 1/4 for her middle sized mummy friend. How much was left over?
Jimmy couldnt sleep because of all the creepy noises one night. A wolf howls at the moon 1/12 of the night. A cricket sounded off 2/4 of the night, and the wind in the trees whisped for 1/8 of the night. How much of the night had their been noises over all?
At Hotel Transylvania, Count Dracula had 4 1/4 jugs of green goup punch in the reception area. Later on Big Foot's family drank 3 1/3 jugs. How much of the punch was left over?
Mavis found that she got a pet dragon for her birthday. Her pet dragon will grow at different rates. One year it will grow 1/2 of its height. The next year it will grow 1/3 of it's height, and the 3rd year 1/4 of it's height. What's the total rate of the dragon's growth?
Count Dracula realized that he was short of rolls of napkins for Mavis' party. When he counted, he only had 120 1/3 rolls. 1 hour later another 65 and 7/8 was gone. How much was there left over?
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