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X marks the Spot
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Mystery Number
What to do?
100

83 / 3= 

27 R2

100

102 x 3 =

306

100
What is 1,243 in expanded notation?

1,000 + 200 + 40 + 3

100

I am a three digit number.

My 7 is worth 100.

My 6 is worth 6.

My other digit is 1

716

100

Eames collects Llamas figurines. When he has 800, his mom says she will buy him a shelf to put them on. He has 14 boxes of 90 llamas.  Can he ask his mom to get him the shelf to display his llamas? (Hint: Do you have to solve this problem to find an exact answer?)

90 X 10 = 900, so even if we round down we know Eames has plenty of Llamas to get a shelf.

200

411 / 5 =

82R1

200

23 x 42 = 

966

200

Write 5,000+ 400 + 30 + 9 in standard notation

5,439

200

I am a 6-digit number.

One of my 8s is worth 800,000. The other 8 is worth 1/10 as much.

My 4 is worth 4(100s).

My 9 is worth 90.

My other digits are 0s.

880,490

200

Kenzie needed to ship 238 soccer balls to her soccer team for practice in Florida. She found boxes that will hold 60 soccer balls. How many boxes should she buy to send the balls?

4 boxes

300

1,234 / 4 =

308 R2

300

76 x 59 = 

4.484

300
Write five thousand thirty-four in standard notation.

5,034

300

I am a 5 digit number.

My 6 is worth 6 * 10,000.

My 3 is worth 3,000.

One of my 9s is worth 90. The other is worth 10 times as much.

My other digit is 2.

63,992

300

Kaelin has 210 chickens. 30 of them can fit in a coop at night. How many coops should she buy for her chickens?

7 coops.

400

325 / 15 = 

21 R 10

400

254 x 32 =

8,128

400
When you multiply by 100 what does it mean?

multiply by 1

400

Write a number riddle for 45,592, using at least 1 number that is 10 times as much as another.

answers vary

400

The whole school is going to an All School Meeting. That is 482 people.  The Multipurpose room can make rows that hold 15 people. If everyone needs to attend, how many rows should they have in the Multipurpose Room?

33 rows

500

3,666 / 12 =

305 R 6

500

899 X 98 =

88,102

500
Write the number 5,678 in expanded notation using powers of ten.

5(103) + 6(102) + 7(101) + 8(100)

500

Write a number riddle for the number: 305,990 where at least one of the numbers is 1/10 as much as another.

answers vary

500

The fifth grade students want to buy new swings for the back playground. They have raised $845 and each swing is $9.  How many swings can they buy?

93 swings