Extend Multiplication Facts (Mental Math)
Conversions
Area or Perimeter Method
Lattice or Partial Products Multiplication
Multistep Multiplication Problems
100

4 * 30=

120

100

Given 1 Liter (L) = 1,000 milliliters (mL)

18 L = ______ mL 

18 L = 18,000 mL

100

What is the area of a rectangle with a side that is 70 cm long and another side that is 9 cm long?

630 cm2

100

Solve the following:

26x5

130

100

Sarah has to buy some items at the store. She wants to know if her $70 is enough to purchase all of the items. Sarah needs to buy 3 cases of water, each case is $7.00. She also needs to get a cake and 12 balloons. The cake costs $20. The balloons cost $3 each. Will Sarah have enough money? What is the exact amount Sarah will spend?

Sarah will not have enough money. Sarah's total will be $77. She will need 7 more dollars to have the correct amount.

200

70 * 20 =

1,400

200

8 hours =  ______  minutes

8 hours = 480 minutes

200

What is the area of a rectangle with a side that is 15 ft. long and another side that is 27 ft. long?

405 ft2

200

Solve the following

48x9

432

200

Jon wanted to buy pizza for the entire class. There are 20 people in his class. He figured that each person would eat two slices and there are 8 slices in each pizza. Each pizza costs $12.00. How many pizzas will Jon need? How much will Jon spend? Explain your thinking.

John will need to buy 5 pizzas. I know this because 20 people * 2 slices each = 40 slices. 8 * ____ = 40 The missing number is 5. If each pizza is $12.00 then I will multiply 12 * 5 and get 60. Jon will spend $60 on the 5 pies he is ordering for his class.

300

6,000 * 30 =

180,000

300

27 Feet = ______ Inches  

27 Feet = 324

300

What is the area perimeter of a rectangle with a side that is 83 cm long and another side that is 94 cm long?

354 cm

300

Solve the following: 

389 * 4

1,556

300

Katie has 2 flowerbeds to fill up with tulip bulbs. One flowerbed measures 24 feet by 6 feet, and the other bed measures 15 feet by 8 feet. Each bulb needs about a square foot of space to grow. If Katie wants each bed to be half red tulips and half white tulips, how many of each color bulb should she buy?

Katie should buy 132 of each color tulip. She can plant a total of 264 tulips in her garden. Since Katie wants half red and half white, I split the total in half. That gave me 132.

400

800 * 40 =

32,000

400

32 hours = _____ minutes

32 hours = 1,920 minutes

400

What is the perimeter of a rectangle with a side that is 76 in long and another side that is 32 in long?

216 sq. in.

400

Solve the following: 

4,927 * 6

29,562

400

Jim’s doctor said he should walk about 10,000 steps each day for his health, so Jim bought a Fitbit to record his steps. About 2,120 of Jim’s steps equal a mile. If Jim has walked about 4 miles today, how many steps has his Fitbit recorded so far? How many more steps does Jim need to reach his goal?

Jim has walked 8,480 steps. Jim needs to walk 1,520 more steps to reach is goal.

500
70,000 * 400 =
28,000,000
500

87 feet = _________ inches

87 feet = 1,044

500

What is the area of a rectangle with a side that is 731 ft long and another side that is 8 ft long?

5,848 ft2

500

Solve the following: 

97 x 93

9,021

500

Erik's family compared cell phone plans to get the best deal. At A-Mobile, the family plan is $45 for each of the first two lines and $12 for each additional line. At B-Mobile, the family plan is $60 for each of the first two lines and $8 for each additional line. Erik's family needs to purchase 6 cell phone lines. Which family plan should Erik's family go with?

Plan A costs (45 x 2) + (12 x 4) = 138 Plan B costs (60 x 2) = (8 x 4) = 152 Erik's family should choose plan A because it would cost less money for six lines.

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