Estimation
Which is the BEST ESTIMATE for the following problem?
1/3 + 2/4
less than 1 OR more than 1
less than 1
1/3 + 2/4
5 4/9 + 3 2/9=
5 4/9 + 3 2/9 = 8 6/9 OR 8 2/3
9 4/8 - 3 3/8 =
9 4/8 - 3 3/8 = 6 1/8
Justify the following problem using ESTIMATION:
6 3/5 + 2 2/3 =
Justify the following problem using ESTIMATION:
6 3/5 + 2 2/3 =
6 1/2 + 3 = 9 1/2
This weekend, Rachel bakes cookies for 1 hour, muffins for 1 1/2 hours, cakes for 2 hours, and bread for 1 1/4 hours. Rachel spent 2-3 hours on Saturday baking and 3-4 hours on Sunday baking. Which two items did she bake Saturday and which two items did she bake Sunday?
Saturday: she baked cookies and muffins.
1 + 1 1/2 = 2 1/2 hours
Sunday: she baked cake and bread.
2 + 1 1/4 = 3 1/4 hours
Which is the BEST ESTIMATE for the following problem?
1 3/4 - 1/8
less than 1 OR more than 1
more than 1
1 3/4 - 1/8
7 3/4 + 2 2/4 =
7 3/4 + 2 2/4 = 9 5/4 OR 10 1/4
3 8/9 - 1 5/9 =
3 8/9 - 1 5/9 = 2 3/9 OR 2 1/3
Justify the following problem using ESTIMATION:
7 2/6 - 3 3/4 =
Justify the following problem using ESTIMATION:
7 2/6 - 3 3/4 =
7 1/2 - 4 = 3 1/2
This weekend, Rachel bakes cookies for 1 hour, muffins for 1 1/2 hours, cakes for 2 hours, and bread for 1 1/4 hours. Exactly how many hours did Rachel spend baking this weekend?
1 + 1 1/2 + 2 + 1 1/4 = 5 3/4 hours
Connor owns a lot of Pokemon cards. 5/8 of his cards are fire types while 1/3 of his card are water types. What is the BEST ESTIMATE for the total amount of fire and water type cards he has?
a. between 0 and 1/2
b. between 1/2 and 1
c. between 1 and 1 1/2
b. between 1/2 and 1
6 3/5 + 2 2/3 =
6 3/5 + 2 2/3 = 8 19/15 OR 8 4/15
4 3/4 - 2 3/5 =
4 3/4 - 2 3/5 = 2 3/20
Justify the following problem using ESTIMATION:
5 2/4 + 2 5/6 =
Justify the following problem using ESTIMATION:
5 2/4 + 2 5/6 =
5 1/2 + 3 = 8 1/2
This weekend, Kennedy spent 1 3/4 hours on cheerleading, 2 hours on dance, 2 1/2 hours on volleyball, and 1 2/3 hours on gymnastics. Kennedy spent 2-3 hours practicing 2 of those sports on Saturday. Which sports did she practice on Saturday?
She practiced cheerleading and gymnastics on Sunday
1 3/4 + 1 2/3 = 2 17/12 OR 3 5/12 hours
Amelia is making smoothies for her teammates. She uses 6 2/3 ounces of bananas and 2 5/8 ounces of mangos. What is the BEST ESTIMATE for how much more bananas Amelia uses than mangos?
a. between 2 and 2 1/2
b. between 3 and 3 1/2
c. between 4 and 4 1/2
c. between 4 and 4 1/2
5 2/4 + 2 5/6 =
5 2/4 + 2 5/6 = 7 16/12 OR 8 4/12 OR 8 1/3
7 2/6 - 3 3/4 =
7 2/6 - 3 3/4 = 3 7/12
Justify the following problem using ESTIMATION:
5 2/5 - 3 2/3 =
Justify the following problem using ESTIMATION:
5 2/5 - 3 2/3 =
5 1/2 - 3 1/2 = 2
This weekend, Kennedy spent 1 3/4 hours on cheerleading, 2 hours on dance, 2 1/2 hours on volleyball, and 1 2/3 hours on gymnastics. Kennedy spent 4-5 hours practicing 2 of those sports on Sunday. Which sports did she practice on Sunday?
She practiced volleyball and dance on Sunday
2 1/2 + 2 = 4 1/2 hours
Karmindy is making cookies for her parents. She uses 5 7/8 ounces of chocolate chips and 1 1/3 ounces of raisins. What is the BEST ESTIMATE for how much more chocolate chips Karmindy uses than raisins?
a. between 5 and 5 1/2
b. between 6 and 6 1/2
c. between 7 and 7 1/2
a. between 5 and 5 1/2
6 3/4 + 2 3/5 =
6 3/4 + 2 3/5 = 8 27/20 OR 9 7/20
5 2/5 - 3 2/3 =
5 2/5 - 3 2/3 = 1 11/15
Justify the following problem using ESTIMATION:
6 3/4 + 2 3/5 =
Justify the following problem using ESTIMATION:
6 3/4 + 2 3/5 =
7 + 2 1/2 = 9 1/2
This weekend, Kennedy spent 1 3/4 hours on cheerleading, 2 hours on dance, 2 1/2 hours on volleyball, and 1 2/3 hours on gymnastics. How many hours did Kennedy spend on sports the entire weekend?
1 3/4 + 2 + 2 1/2 + 1 2/3 = 7 11/12 hours