Category: Addition and subtraction

Freezing temperatures on Valentine’s Day

[FACTFUL MATH] Grade level: 4 – 6th grades

Math skills: Subtraction of negative numbers

Related Environmental issues: Weather

Extreme cold air from the Arctic is expected to bring freezing temperatures to many parts of the United States on Valentine’s Day.

The table below shows daily forecast of Minneapolis, MN.

  1. Which day is the warmest?
  2. Which day is the coldest?
  3. What is the difference between high and low temperatures of Valentine’s Day?

ANSWER:

  1. Monday
  2. Sunday
  3. 14 degrees

-6 – (-20) = -6 + 20 = 14

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Factful Environmental Math Problems (2020)

Just published and now available from Amazon  (paperback)

About this book

The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

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Published: March 26, 2020

Price: $6.25

How many less miles do Americans travel amid the coronavirus pandemic?

Grade level: 4th – 6th grades

Skills: Subtraction and multiplication (decimals) 

Related environmental issues: Others

The majority of the world’s population has been under some type of stay-at-home orders due to the Coronavirus pandemic. Since those orders were issued, people have changed their habits and traveled less.

The table below shows the average travel distance of residents in Daytona beach, Florida, and Seattle, Washington, on February 28 and March 27, 2020.

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  1. Between February 28 and March 27, how many less miles did the average resident in Daytona Beach travel?
  2. Between February 28 and March 27, how many less feet did the average resident in Seattle travel? (1 mile = 5,280 feet)

 

 

Source: The New York Times, (April 2, 2020). Where America Didn’t Stay Home Even as the Virus Spread. 

 

 

Answer keys

1. 2.5 miles (4.4 – 1.9 = 2.5)
2. 20,003 feet (3.8 x 5,280 – 61 = 20,003)

 

Factful Environmental Math Problems (2020)

Just published and now available from Amazon  (paperback)

About this book

The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

Screen Shot 2020-04-02 at 10.20.25 AM

 

Screen Shot 2020-04-02 at 10.31.32 AM

Screen Shot 2020-04-02 at 10.31.38 AM

unknown-1

Published: March 26, 2020

Price: $6.25