Rounding and Estimation
Place Value
Adding and Subtracting Decimals
Problem Solving
Multiplication
100
12,064 rounded to the nearest hundreds
What is 12,100?
100


When multiplying a number by 104, how is the decimal point moved?

The decimal is moved 4 places to the RIGHT.



100

Solve for n: 102. 36 + 6.320 = n.

What is 108.680? (n = 108.680)

100
Mr. K bought a pack of pencils and then gave 12 away. He now has 24 left. How many pencils were in the pack of pencils that Mr. K bought?
What is 36 pencils?
100

27 x 45 

1, 215

200
Round 23.009 to the nearest hundreth.
What is 23.01?
200

Write 23.64 using expanded form.

What is 

(2 x 10) + (3 x 1) + (6 x 1/10) + (4 x 1/100)

200

Solve for n: 58.005 - 1.098 = n.

What is 56. 907? (n = 56. 907)

200
Julie spent $7.99 on a book and $12.75 on art supplies. How much did she spend on the book and art supplies all together?
What is $20.74?
200


Use the area model to find the PARTIAL PRODUCTS for 2.5 × 1.7.  

2 x 1 = 2

1 x .5 = .5

2 x .7 = 1.4

.7 x .5 = .35

300
Round 643.82 to the nearest one.
What is 644?
300

The relationship between the 4's in 40, 234 is...

The 4 in the ten thousands place is 10,000 times the value of the 4 in the ones place.

300
Maddie made a deposit of $280 to her bank account. Her balance is now $630.42. What was her balance before the deposit was made?
What is $350.42?
300

Mr. Wilson's vegetable garden is rectangular. It is 7.75 m long and 3.5 m wide. He needs to fill the garden with soil.  How much soil does he need to cover the rectangle?

What is 27.125 cubic meters?

300

45.98 x 2.2

101.156

400
Estimate the sum to the nearest whole number. 29.1 + 78.9 + 41.5
What is approximately 150?
400

80 x 105

What is 8,000,000?

400
Yosemite National Park covers 750,000 acres. Mammoth Cave National Park covers 52,830 acres. How many more acres does Yosemite cover than Mammoth Cave?
What is 697,170 acres?
400
Robert used $5.00 to buy a sandwich and soup for lunch. The soup cost $1.25 and he received $1.86 in change. How much did the sandwich cost?
What is $1.89?
400

295 x 4.2

1, 239

500

Max went shopping last Saturday at Target and bought socks for $6.52; long pants for $19.89; and shirts for $21.15. What is the best estimate for how much money Max spent?

Answers May Vary

500

Use powers of 10 to write 3.123 in expanded form.

3 x 100 + 1 x 10-1 + 2 x 10-2 + 3 x 10-3

500
Mrs. Sharkey has a basket of 17 tomatoes. She makes sauce with 9 tomatoes. If Mrs. Sharkey wants to split up the rest between Mrs. Neyland, Mr. Kershner, Mrs. Guinn, and herself, how many tomatoes does each person get? Show your work.
What is 17 - 9 = 8; 8/4 = 2 tomatoes each.
500
Jenna has two $5 bills and three $10 bills. She spends $3.85 for a milkshake and $7.98 for a banana split. How much money does she have left?
What is $28.17?
500
Ethan, Paula, and Grace W. each have $0.50. Ethan has 6 coins; Paula has 7 coins; and Grace has 8 coins. What coins does each person have?
Ethan: 10 - 10 - 10 - 10 - 5 - 5 or 25 - 5- 5- 5- 5- 5 Paula: 10 - 10 - 10 - 5 - 5 - 5 - 5 Grace: 10 -10 -5 - 5 - 5 - 5 - 5 -5 or 25- 10- 10-1-1-1-1-1
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