10 Times
Greater Than Less Than
Rounding/Estimating
Tape Diagrams
Mental Math
100
Give the number that is 10 times as much as 22,345.
What is 223,450.
100
Compare these numbers. Use the <, >, = symbols. 4 ten thousands 6 hundred thousands _____ 604,000
What is >. 640,000 > 604,000.
100
Round this number to the nearest ten and the nearest thousand: 4,459
What is 4,460 and 4,000.
100
Make a tape diagram and then solve this problem: 228,039 - 89,556
What is x = 138,483. Your tape diagram should have 228,039 on top, 89,556 in one box, x in the other box, and outside x= 138,483.
100
Add without using whiteboards or scratch paper. 30 + 70 + 45
What is 145.
200
Give the number that is 10 times less than 1,978,650.
What is 197,865.
200
Compare these numbers using the symbols <, >, =. 30,000 + 2,000 + 400 + 90 _____ 2,000 + 30,000 + 900 + 40
What is <. 32,490 < 32,940.
200
Round your answer to the nearest ten thousand: 31,567 - 18,420
What is 31,567 - 18,420 = 13,147 13,147 ~ 10,000
200
Make a tape diagram and then solve the problem: 43,876 + 712,768
What is x = 756,644. You should have x on the top of your tape diagram and in the two boxes are 43,876 and 712,768.
200
Solve without using whiteboards or scratch paper. 60 - 40 + 100 + 30
What is 150.
300
Dartmouth College has raised $6,331 for their Science Department. The Dean is hoping they can raise 10 times as much as that. How much does he want them to raise?
What is $63,310.
300
Add and compare these numbers using symbols <, >, =. 1 ten thousand 4 thousands 6 ones + 8 ten thousands ______ 9 ten thousands 200 ones
What is >. 94,006 > 90,200.
300
Round your answer to the nearest thousand. Then explain if your actual answer and the rounded answer are reasonable. 45,231 + 2,564
What is 45,231 + 2,564 = 47,795 47,795 ~ 48,000
300
Peter was helping his mom put stamps on letters that needed to go out. He licked 23 stamps. Fudge wanted to help too but mostly licked stamps. He licked 58 more stamps than Peter. How many more stamps did Fudge lick than Peter? Show your answer in a tape diagram.
What is 58 stamps. You should have one box for Peter showing 23 stamps. Below him you should have boxes for Fudge. One box showing 23 stamps along with another box that has 58. There should be a bracket labeled with S for your answer. S = 81 stamps that Fudge licked. Now solve for how many stamps Fudge licked over Peter: 81-23 = 58 stamps.
300
Again solve in your head only. 40 x 8 + 10
What is 330.
400
Zeus has 4,667 lightning bolts. Poseidon has 3,242 tridents. Their brother Hades wants to have 10 times as many weapons as his brothers. How many does Hades want to have in all?
What is 79,090 weapons.
400
Subtract and then compare using <, >, =. 600,000 + 50,000 +300 + 6 - 500,000 + 90,000 + 9,000 + 900 + 9 _____ 6 ten thousands
What is <. 50,397 < 60,000.
400
On Monday our class read for 184 minutes. On Tuesday, we read for 45 minutes more than on Monday. How many minutes did we read for both days? Estimate your answer to solve. Don't give the actual answer just your estimate.
What is 180 + 50 = 230 minutes read for Monday and Tuesday.
400
Make your own word problem for this tape diagram: The top of your tape diagram is X. In the two boxes you have 4,326 and 3,561.
What is answers vary. Make sure your word problem is an addition one, because the x on top means you don't have the answer (the biggest number).
400
Again solve in your head. 5 ten thousands + 2 ten thousands + 3 hundreds.
What is 7,300 or 7 ten thousands 3 hundreds.
500
Ben Gunn was counting all of his gold and found that he had an 88,555 coins. Long John Silver wants this treasure, but was hoping for 10 times as much as that. How much was Silver hoping for? Solve and then round your number to the nearest ten thousand to check your answer. Is it reasonable?
What is 885,550? Rounded: 890,000. Yes it is reasonable because 885,550 is close to 890,000 and I could've rounded 88,555 to 89,000 and multiplied that by 10 to get 890,000.
500
In one year the Smith family used 27,854 rolls of toilet paper. While the Johnson family used 2 ten thousands 8 hundreds 4 ones 7 thousands 5 tens of toilet paper in a year. Which family used more? Show using symbols <, >, or =.
What is they both used the same amount. The Smith Family = The Johnson Family.
500
Everyday our 4th grade class walks up and down the hill to get to the Upper Building. Last week we walked 1,348 steps. This week we walked 2,513 steps. How many more steps did we take this week than last week? Solve and then estimate your answer. Compare the two answers.
What is 2,513- 1,348 = 1,165 more steps this week 2,500 - 1,300 = 1,200 My estimate is close to my actual answer. I know this because if I were to round 1,165 to the nearest hundred it would round to 1,200.
500
Make your own word problem for the following tape diagram: The top of the tape diagram has 80,000. There are two boxes below. One box has 40,201 and the other box has an x.
What is answers vary. You need to make this a subtraction problem since you were given the biggest number on top and have a missing number in the box.
500
Again solve in your head. 5 x 70 + 20
What is 370.
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