Estimation Part 2 Solve the following problems Ron

Estimation Part 2

Solve the following problems: Ron and Amanda collected 497 buttons, but they used 177 of them while fixing some jackets. About how many buttons do they have now? Choose the best estimate. Think- Pair- Share Estimation Review

497 -177 4 9 7 9 > 5 so we RAISE THE SCORE 4 + 1= 5 and all values after become 0. So 497 rounds to 500 1 7 7 7 > 5 so we RAISE THE SCORE 1 + 1=2 and all values after become 0. So 177 rounds to 200 500 -200= 300

Estimate 8 x 532 Estimating Products

8 x 532 8 x 5 3 2 3<5 so we leave it the same 8 x 5 0 0 4, 000

Estimate the quotient of 553 ÷ 8 Which multiple of 8 is closest to 55? Factors of 8 - 8, 16, 24, 32, 40, 48, 56, 64 56 is closest to 55. So, 8 and 560 are compatible numbers. 560 ÷ 8= 70 Estimating Quotients

We are fencing in a rectangular area in the school courtyard for a special Science project. The fencing materials cost 50 cents per square foot. How much should we budget to spend on this project? The area is 9 feet long x 27 feet wide An area of a rectangle is length x width. We want to have at least 9 x 27 worth of materials. In this case it is better for us to overestimate. Estimating Products

If our area is 9 x 27 what would be a good value to round to in order to have enough fencing materials? 9 x 27 9 x 30 The actual area of our Science project area is less than 270 square feet but this will make sure we can fence the area. So at 270 square feet and 50 cents per square foot, we will can expect to spend no more than $135 on fencing materials.

Mrs. Young has planned a 6 th grade trip to Memphis, Tennessee to visit the National Civil Rights Museum. The bus driver will drive 120 miles roundtrip and the maximum speed the bus can travel is 63 miles per hour. How long will the drive take? Estimating Quotients

We We know that the trip is 120 miles total. also know that the bus can only go 63 miles per hour. It is better for us to underestimate the speed so that we can be sure we get there in plenty of time. 63 60 120 ÷ 60 = 2 SO- our trip to the museum will take about 2 hours.