Lesson 24 mars Math

Lesson 24
Living on Mars

Solve real world problems by performng opertions with decimals. ​

Our Mission:

Our goal is the solve real-world problems by multiplying and dividing decimals using the standard algorithm.

First we warm up our math muscles

Please process silently to give everyone a chance to do their best work.

Multiple Choice

When adding or subtracting decimals you set up your problem by

• lining up the decimals so that the ones and tenths are in in the same place

• lining up the numbers from the right so that each number is directly under a number

• lining up the numbers from the left so that each number is directly under a number

• It doesn't matter. Do it the way you like.

Multiple Choice

A number with only two factors, 1 and the number itself

• even number

• odd Number

• prime number

• composite number

Multiple Choice

A number with more than two factors

• even number

• odd number

• prime number

• composite number

Multiple Choice

The common factor between two numbers that is the greatest (largest).

• prime factor

• important factor

• LCM

• GCF

Multiple Select

Which TWO numbers are PRIME.

• 3

• 9

• 57

• 19

Multiple Select

Which TWO numbers are COMPOSITE

• 2

• 25

• 87

• 37

Multiple Select

Check ALL the numbers that are a factor of 8.

• 1

• 4

• 8

• 16

• 32

Multiple Choice

What are the prime factors of 27?

• 3x3x3

• 3x2x3

• 3x3x4

Multiple Choice

Find the prime factors of 45.

• 5x9

• 3x15

• 3x3x5

Multiple Choice

Sum

• The answer to an addition problem

• The answer to a subtraction problem

• The answer to a multiplication problem

• The answer to a division problem

Multiple Choice

Difference

• The answer to an addition problem

• The answer to a subtraction problem

• The answer to a multiplication problem

• The answer to a division problem

Multiple Choice

Product

• The answer to an addition problem

• The answer to a subtraction problem

• The answer to a multiplication problem

• The answer to a division problem

Multiple Choice

Quotient

• The answer to an addition problem

• The answer to a subtraction problem

• The answer to a multiplication problem

• The answer to a division problem

Multiple Choice

Area

• The distance around the edge of a shape

• The answer to a subtraction problem

• The amount of space inside a shape

• The answer to a division problem

Dropdown

To find the area of a rectangle you ​

Select answer

Multiple Choice

to find the area of a triangle you use?

L=length, W=width, B=base, H=height

• L ⋅W

• 1/2(B⋅H)

• 2B+2H

• 2L+2W

Multiple Choice

Perimeter

• The distance around the edge of a shape

• An arrangement of objects, pictures, or numbers in rows and columns

• The amount of space inside a shape

• The answer to a division problem

Multiple Choice

Addend

• Numbers you multiply to get the product

• Numbers you add together to get the sum

• A number to be subtracted from another

• A number from which another is to be subtracted

Multiple Choice

Subtrahend

• Numbers you multiply to get the product

• Numbers you add together to get the sum

• A number to be subtracted from another

• A number from which another is to be subtracted

Multiple Choice

minuend

• Numbers you multiply to get the product

• Numbers you add together to get the sum

• A number to be subtracted from another

• A number from which another is to be subtracted

Multiple Choice

Divisor

• A number by which another number is to be divided

• Numbers you add together to get the sum

• A number to be subtracted from another

• A number to be divided by another number

Multiple Choice

What is the GCF of 56 and 49?

• 14

• 2

• 8

• 7

Multiple Choice

To solve the following problem, what equation would you use? Susan took her dog Fluffster on a 3/4 mile walk around her neighborhood. Her dog chased a squirrel for 1/3 of a mile and they walked the remaining distance. What fraction of the distance did they run?

• 1/3 divided by 3/4
• 3/4 divided by 1/3
• 3/4+1/3
• 3/4 - 1/3

Multiple Choice

what are the factors of 12?

• 1,2,3,4,6,12
• 0,1,2,3,4,6,8,10,12
• 2,4,12
• 2,6,12

Multiple Choice

The number on the top of a fraction is called what?

• denominator
• numerator
• equivalent
• fractionator

Multiple Choice

The number on the bottom of a fraction is called what?

• denominator
• numerator
• equivalent
• fractionator

Multiple Choice

Which fraction is equivalent to 1?

• 1/2
• 1/10
• 5/5
• 5/1

Multiple Choice

1/2 is equivalent to 4/6.

• True
• False

Multiple Choice

What number would go in the blue square?

• 1

• 3

• 9

• 8

Multiple Choice

Simplify the ratio of
35 : 14

• 5 : 2
• 2 : 5
• 3 : 1
• 35: 14

Multiple Choice

#1 How many minutes does it take for a radio message to reach Mars at its closest distance to Earth, if the distance is 34.8 million miles and radio waves travel at 186,000 miles per second?

• 3.12 minutes

• 22.40 minutes

• 187.097 minutes

• 2.84 minutes

Multiple Choice

#2 What is the time taken for a radio message to reach Mars at its farthest distance from Earth, given that the distance is 250 million miles and radio waves travel at 186,000 miles per second?

• 3.12 minutes

• 22.40 minutes

• 187.097 minutes

• 2.84 minutes

Multiple Choice

#3 If an astronaut on Mars needs 730 grams of oxygen per day, how many kilograms of oxygen will they need for a day?

• 0.84 kilograms

• 7.30 kilograms

• 613.2 kilograms

• 0.073 kilograms

Multiple Choice

#4 How many liters of water would be required for a day on Mars if the daily requirement is 25.9 liters per person and there are 104 people in the crew?

• 2,693.6 liters

• 259 liters

• 104 liters

• 25.9 liters

Multiple Choice

#5 If 1.27 pounds of food are needed per meal, how many pounds of food are needed for 730 meals?

• 2,781.3 pounds

• 925.1 pounds

• 1,251.59 pounds

• 3,81 pounds

Multiple Choice

#6 What is the total weight of food, water, and oxygen combined in kilograms?

• 4,558.39 kilograms

• 5,558.39 kilograms

• 3,558.39 kilograms

• 6,558.39 kilograms

Multiple Choice

#7 How much does it cost if the total weight of supplies is multiplied by $20,000?

• A) $91,167,800

• B) $81,167,800

• C) $101,167,800

• D) $71,167,800

Draw

Draw yourself on Mars with the stuff you would take with you

Multiple Choice

#8 How much fuel does a rocket use to reach a height of 61 kilometers if it has a mass of 2.3 million kilograms at takeoff and 0.131 million kilograms after reaching that height?

• 2.169 million kilograms

• 2.431 million kilograms

• 2.0 million kilograms

• 1.169 million kilograms

Multiple Choice

#9 If it takes Earth 365 days to orbit the sun, how many days does it take Mars to orbit the sun, given that Earth's orbital period is about 0.531 times as many days as Mars' orbital period?

• 687 days

• 365 days

• 194 days

• 531 days

Multiple Choice

#10 If a bag of apples weighs 3 pounds on Earth, approximately how much would it weigh on Mars, where the gravitational pull is about 38% of Earth's?

• 1.14 pounds

• 1.50 pounds

• 2.50 pounds

• 0.38 pounds

Multiple Choice

#11 If light travels at about 11 million miles per minute, how many minutes does it take for light to travel from the sun to Earth, which is 92.96 million miles away?

• 8.45 minutes

• 9.26 minutes

• 10.27 minutes

• 11.00 minutes

Multiple Choice

#12 The closest distance from Earth to the moon is about 225 thousand miles, and the closest distance from Earth to Mars is about 34 million miles. Approximately how many times farther is Mars from Earth compared to the moon?

• 151.1 times

• 135.2 times

• 120.5 times

• 100.0 times

Draw

Did we meet out goal to multiply and divide decimals by decimals using the standard algorithm to solve real world problems?

Draw your arrow where you think we hit on the target.