Aquarium
An aquarium opens at 10 a.m. and closes at 8 p.m.
How many hours are the aquarium open in a day?
The aquarium opens for 10 hours in a day
Liam was sick last Friday.
He usually gets up at 7:35 a.m. Since he was sick, he got up 1 hour and 35 minutes later than usual. What did he get up?
He got up at 9:10a.m.
Mrs. Carson is preparing a birthday party for her son, Matthew. Matthew and his two brothers also help with the preparations.
Matthew invited 11 children from school and 6 children from the neighbourhood. Including Matthew and his two brothers, how many children will be at the party?
11 + 6 + 3 = 20
There will be 20 children at the party.
I = 1 V = 5 X = 10 L = 50
C = 100 D = 500 M = 1,000
So CDXXXIX = ________
439
Round to the accuracy of the underlined digit.
56,914 =
57,000
On Saturday, 351 people are admitted to the aquarium. Over the weekend, there were total of 642 people admitted to the aquarium. Were there more people going to the aquarium on Saturday or on Sunday?
642 – 351 = 291
On Sunday, there were 291 people admitted to the aquarium. There were more people going to the aquarium on Saturday.
He has some pain killers at home for his headache and fever. There are 36 tablets left in the bottle and he is supposed to take 2 tablets at a time, 4 times a day. How many tablets will be left after one day? How many days before he runs out of tablets?
36 – 4 x 2 = 28 There will be 28 tablets left after one day.
Matthew and his two brothers helped to decorate the house for the party. Each of them blows 12 balloons. But 5 balloons pop. How many balloons do they have for decoration?
12 x 3 – 5 = 31
They have 31 balloons to use for decoration.
I = 1 V = 5 X = 10 L = 50
C = 100 D = 500 M = 1,000
So CCXLVI = ________
698
Round to the accuracy of the underlined digit.
77,453 =
77,500
The admission price for an adult is $5.50. The admission price for a child is $3.00. How much is the total cost for a mother to bring her two children to the aquarium?
$5.50 + $3.00 + $3.00 = $11.50 The total cost is $11.50
Liam went to the doctor. There are 8 patients waiting. The nurse told him it will be his turn after 2 hours. How many minutes would the doctor use to see each patient?
2 hours = 120 minutes 120 ÷ 8 = 15 The doctor spends on average 15 minutes with each patient
Each paper cup can hold 6 oz. of juice. If Mrs. Carson wants to have a cup of juice for each child, how many gallons of juice does she need to buy?
16 ounces = 2 cups = 1 pint
2 pints = 1 quart
4 quarts = 1 gallon
6 oz. x 20 = 120 oz. They need 120 oz. of juice. 1 gallon = 4 quarts = 8 pints = 128 ounces. 128 > 120
Mrs. Carson only needs to buy 1 gallon of juice.
I = 1 V = 5 X = 10 L = 50
C = 100 D = 500 M = 1,000
So CCXLVI = ________
246
Round to the accuracy of the underlined digit.
90,205 =
90,000
There are total of 32 staff members working in the aquarium 5 8 of the staff are security guards. How many security guards are there in the aquarium?
32 × 5 8 = 20 There are 12 security guards working in the aquarium.
Liam had read that oranges are good for him. He went to buy 8 oranges at the grocery store. Each orange weighed 150 grams. What was the total weight (measured in Kg) of the 8 oranges?
Remember: 1000 gram = 1 kg
150 x 8 = 1,200 1,200 grams = 1.2 Kg
The total weight is 1.2 Kg.
Mrs. Carson plans to have 1/8 of a pie for each child at the party. How many pies does she needs to prepare?
1/8 × 20 = 20/8 = 5/2 = 5 1/2
2 1/2 is between 2 and 3.
Mrs. Carson needs to prepare 3 pies.
I = 1 V = 5 X = 10 L = 50
C = 100 D = 500 M = 1,000
So CCLXXXIII = ________
283
Round to the accuracy of the underlined digit.
49,332 =
49,330
The security guards are equally divided into four teams to rotate with the shifts. How many guards are there in each team?
20 ÷ 4 = 5 There are 5 security guards in each team.
Liam ate 1 3/8 of an orange before he took his medicine and ate another 2 1/8 of an orange afterwards. How much orange did he eat?
1 3/8 + 2 1/8 = 3 4/8 = 3 1/2
He ate 3 1/2 oranges
Each pie takes 35 minutes to bake but Mrs. Carson’s oven is so small she can only fit one pie at a time. The party starts at 3:00 p.m. When is the latest time for Mrs. Carson to start baking?
3 X 35 = 105
105 minutes = 1 hour and 45 minutes
It will take 1 hour and 45 minutes to cook all 3 pies. She needs to start baking at 1:15 p.m to finish all the pies by 3 pm.
I = 1 V = 5 X = 10 L = 50
C = 100 D = 500 M = 1,000
So DCCLXIII = ________
763
Round to the accuracy of the underlined digit.
33,446 =
33,400