Mental Math and multiples of 10
Estimation Strategies
Area Models and Distributive Property
Partial Products and Standard Algorithm
Multi-step word problems and reasoning
100

What is 30x40

1,200
100

Round both numbers to the nearest ten and estimate the product. 28x41=??

30x40=1200

100

How would you write the number 43 in an area model? Hint: Think expanded form. 

40+3

100

Solve 12x13 any way you choose

156

100

A baker makes 15 batches of cookies. Each batch has 24 cookies. How many cookies were baked in all? 

360 cookies

200

What is 50x70

3.500

200

True or False. Estimating 52x68 to 50x70 will give you a reasonable estimate. 

True

200

In an area model for 23x15, what are the four multiplication problems you would solve inside the boxes? 

20x10, 20x5, 3x10, 3x5

200

What are the 2 partial products when solving 42x20

800 and 40

200

A hotel has 12 floors. Each floor has 25 rooms. If all rooms are booked for $100 per night, how many rooms are in the hotel? 

300 rooms

300

What is 60x80?

4,800

300

What would you round this equation to for a quick estimate? 24x19=

25x20= 500

300
Using the distributive property how would you rewrite this equation to distribute just one of the two numbers? 14x12

14x10+14x2 or 10x12+4x12

300

Solve any way you choose. 25x32

800
300

Maya reads 18 pages every day for 14 days. Her goal is 300 pages. Did she meet her goal? How much was she over or under? 

No she read 252. She is under by 48 pages.
400

A theater has 20 rows with 30 seats in each row. How many seats are there total? 

600 seats

400

A school buys 32 boxes of markers. Each box contains 48 markers. ABOUT how many markers did the school buy? 

30x50=1500 markers

400

An area model has these partial products: 400, 80, 30, and 6. What is the final product?

516

400

Solve any way you choose. 34x52

1,768

400

A park charges $15 per ticket. A group of 22 adults and 18 children buy tickets. How much money is spent on tickets in total? 

$600

500

What is the missing number in this equation? 90x___= 3,600

40

500

Why is 40x 50 a better estimate for 39x52 than 30x50? 

Because 39 is closer to 40 and 52 is closer to 50 making the estimate more reasonable. 

500

Use an area model to solve this equation using partial products. 35x24

30x20=600

30x4= 120

5x20= 100

5x4= 20

Product= 840

500

What are the partial products of 67x43? Solve any way you choose. 

60x40= 2400

60x3=180

40x7= 280

7x3= 21

Product= 2,881

500

Marcus bought 16 boxes of pencils with 12 pencils in each box. He shared 45 pencils with his classmates. How many pencils does he have left?

16x12=192

192-45=147 left

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