Estimating Sums and Products: Fun Math Challenges for Students
This review focuses on estimating sums and products with real-world applications. It presents various scenarios, such as estimating the sum of 272 and 611, and the product of 68 and 42, engaging learners to practice mental math. Additionally, it covers hamburger consumption in Pennsylvania, illustrating estimation in daily, weekly, and monthly contexts. The chapter also includes rounding exercises related to visitor statistics in New York City and challenges on maximizing and minimizing sums using digits. Perfect for honing estimation skills in a fun way!
Estimating Sums and Products: Fun Math Challenges for Students
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Presentation Transcript
Which number closest to the sum of 272 and 611 (estimate)? • 400 • 1200 • 1000 • 900
Which of the following is closest to the product of 68 and 42 ? • 280 • 2800 • 28,000 • 280,000
An average of 20,000 pounds of hamburger is eaten each day in Pennsylvania. How much hamburger is eaten in one week?
How much hamburger is eaten in one month?( 30 days in a month)
During the past decade 18,786,110 people visited New York city. Round that number to the closest million.
In New York there are about 60 restaurants for every 10,000 visitors. About how many restaurants are there in New York City?
Greater than or less than? 12,000,000 ____ 6,988,676
63 630 6,300
18 1,800 18,000
Multiply 9 * 56 =
Multiply 32 * 6 =
Multiply 84 * 36 =
Multiply 32 * 17 =
Challenge Problems: These will not be on your test, but be offered as bonus problems.(similar ones to these)
Use the odd digits below to make the largest possible sum. 9,8,7,6,5,4,3,2,1,0
Two possible answers 973 + 51 = 1024 953 + 71 = 1024 (strategy: use largest digits first)
Use even digits below to make the smallest possible sum. 9,8,7,6,5,4,3,2,1
Solution 204 - 86 = 118 (strategy: use smallest numbers first)
