Rounding
Addition
Subtraction
Multiplication
Division
100

Round 0.088 to the hundredths place.

What is 0.09?

100

0.96 + 0.34

 1.30?

100

15 - 3.21

 11.79

100

7.82 x 48

375.36

100

42.87 / 3

14.29

200

Round 0.837 to the tenths place.

What is 0.8?

200

72.8 + 3.21

76.01

200

58 - 9.09

48.91

200

583 x 3.42

1993.86

200

185.5 / 0.5

371

300

ESTIMATE 2.04 + 6.63

What is 9?

300

3.2 + 0.95+ 13

17.15

300

4.3 - 1.2 -0.25

2.85

300

8.4 x 7.8

65.52

300

34.68 / 1.2 

28.9

400

At the craft store, a canvas is $14.23, paint is $2.89, and a paint brush is $1.99. Estimate how much money I'll need to the nearest dollar. 

$19

400

I am baking! The cookies need 3.4g of sugar, the muffins need 1.23g of sugar, and the bread needs 10.025g of sugar. How many grams of sugar do I need?

14.655g

400

My total at the grocery store came to $85.54. If I paid with a hundred dollar bill, how much change should I expect? 

$14.46

400

My friends and I are going to the movies. Tickets cost $11.75 each. How much would it cost for me and 5 of my friends?

*hint: put in proper money form. 

$70.50 

400

In Science, Ms. Olson had 60.3 grams of metamorphic rock. She has to divide the rocks into 9 different containers for her class. If the rocks are equally divided by weight, how many grams of rock would be in each container? 

6.7grams

500

Gas is currently being sold at $1.9296L. How much would 10L litres cost?

Hint, round to the nearest hundredth to know how much money you would spend. 

$19.30

500
I am at the movies with 5 of my friends. Popcorn costs $5.35, pop costs $2.65, and a bag of candy costs $3.45. A bag of popcorn can be shared between two people, and a bag of candy can be shared between three people. Everyone will get their own pop. How much would everything cost? 

Popcorn - 3 x $5.35 = $16.05

Candy - 2 x $3.45 = $6.90

Pop - 6 x $2.65 = $15.90

$15.90 + $6.90 + $16.05 = $38.85

Answer is $38.85

500

I was driving with a fish tank with no lid in the passenger seat. The fish tank started off with 30.78 litres. I went over 6 speedbumps and lost water each time. When I got to my destination, the fish take had 22.89 litres. What was the average amount of water I lost each bump? 

1.315L 

500

Our pool needs 30.6mg for every 9L. How many mg of chlorine would I need if the pool can hold 975L of water? 

One litre of water needs (30.6mg/9L) of chlorine.

One litre of water needs 3.4mg of chlorine. 

3.4 x 975L  

=3315L 


500

Grandma is babysitting 4 of her grandkids. She has enough candy to give each grandchild 15 pieces. But then she gets a phone call saying that 2 of her grandkids are bringing a friend. How many pieces of candy would each of the children receive so that everyone gets the same amount?

15 x 4 = 60 total pieces of candy. 

60/6 = 10 pieces of candy. 

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