Factful math: Grade 4th-6th
Math skills: Percentage
Related Environmental issues: Biodiversity
The United States tries to protect 30% of U.S. lands and 30% of its ocean to protect wildlife by 2030.
Only 12% of lands and 23% of the ocean are protected in the U.S. The area of U.S. lands is 3.8 million mi2. How much more lands need to be protected by 2030?
3.8 x 0.3 – 3.8 x 0.12 = 1.14 – 0.456
1.14 – 0.456 = 0.684 million mi2 = 684 thousand mi2
Or 3.8 x (0.3 – 0.12) = 0.684 million mi2 = 684 thousand mi2
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)
Published: March 26, 2020