Rounding
For 562 + 998, which method produces an estimate that is most accurate to the actual answer?
(a) rounding to the nearest hundred
(b) rounding to the nearest ten
(c) rounding to the nearest ten thousand
(d) rounding does not exist!
(b) rounding to the nearest ten
Which digit is a place holder in the number 7,089?
0
What is a good estimation for 11 x 14?
140 or 150
Building #1 is 36ft tall, Building #2 is 40ft tall, Building #3 is 45ft tall, and Building #4 is 51ft tall. About how tall is Building #6?
About 60ft tall
Complete the phrase: "5 or _____ raise the score, 4 or less, let it ____"
1st word: More
2nd word: Rest
What is the value (not place value) of the digit 4 in 42,778?
40,000
Solve 13 x 17 using the Nikhilam, then round to the nearest tens.
13 x 17 = 221
nearest tens: 220
There are 33 people standing in line. About how many fingers total are in the line?
About 300 or 330
What is 29,452,156 rounded to the nearest ten thousands place?
29,450,000
What is the expanded form of 5,222,312?
5,000,000+200,000+20,000+2,000+300+10+2
Estimate 181 divided by 59
Round the numbers: 180/60 = 30
There are 7 donuts in a pack and the serving size is about 4 donuts. If you eat 3 packs about how many servings of donuts did you have?
About 5 servings
Ms. Culkin wanted to order coloring books for the entire school. There are 2, 612 students in ps 176. About how many should she order?
About 2,700 to 3,000
What is 934,547 rounded to the nearest hundred thousands?
900,000
True or false: the digit 6 is in the six thousands place.
526,911
FALSE! there is no such thing as the "six thousands place". the digit 6 is in the ONE THOUSANDS place.
Solve 22 x 28 using the "by one more" method, then round to the nearest tens.
22 x 28 = 618
nearest ten: 620
Your car broke down and you have 3 hours to walk to work. The office is 23 miles away and you can walk 9 miles an hour. Can you make it to work in time?
YES! in 3 hours you travel 27 miles so you will make it before 3 hours.
What is 434 + 24,456 rounded to the nearest ten thousands?
Nearest hundred: 400 + 24,500 = 24,900
Nearest ten: 430 + 24,460 = 24,890
Answer and round: 434 + 24,456 = 24,890
What is the digit in the one hundred millions place?
341,785,209
3
Estimate 2434 divided by 41.
Round 2434 to 2400. Round 41 to 40.
2400/40 = 60
There are 1863 peanuts in a bag. You want to share the peanuts with your 9 friends. How many peanuts do each friend get?
About 200 each
There are 93 calories in a candy bar. About how many calories are in six candy bars?
About 540 or 600 candy bars