Vocabulary
What are the two vocabulary words that make up a multiplication equation?
Factor and product.
Factor x Factor = Product
What is 3 x 231?
693
What is 11 x 53?
583
Mr. Shoenfeld is buying books for his classroom library. He has three empty bookshelves and each bookshelf can hold 391 books. How many books does Mr. Shoenfeld need to buy to fill all three bookshelves?
391 x 3 = 1,173
Answer: Mr. Shoenfeld needs to buy 1,173 books.
What is a multiple?
Multiples are the numbers you land on when you skip count.
Find the product of 5 and 649.
3,245
What is 32 x 24?
816
Greenfield is hosting Trunk or Treat at the end of October. Each grade level is being asked to provide 2,364 pieces of candy. Only four grade levels met this goal. How much candy did those four grade levels bring?
2,364 x 4 = 9,456
Answer: The four grade levels collected 9,456 pieces of candy.
What is standard algorithm?
Standard algorithm is when you line up the place values before multiplying from right to left.
What is 3,697 x 1?
3,697
Find the product of 42 x 38.
1,596
Mrs. Bachman is building a new backyard for her dog, Cooper. She needs to buy enough turf to fill the entire backyard. The length is 23ft. and the width is 34ft. How much turf will Mrs. Bachman need to buy?
Area = Length x Width
23ft. x 34ft. = 782 sq.ft.
Answer: Mrs. Bachman will need to buy 782sq.ft. of turf for her new backyard.
What is area model?
The area model separates the larger factor into numbers based on their place value. When multiplying, you get partial products that you add together.
What is 2,548 x 5?
12,740
What does 54 x 36 look like when using distributive property?
54 x 36 = (50 x 30) + (50 x 6) + (30 x 4) + (4 x 6)
Ms. Wilson is baking cookies for her two classes. Her first class has 19 students. Her second class has 21 students. She wants to make enough cookies so each student can have 2. How many cookies does she need to bake?
Step 1: 19 x 2 = 38
Step 2: 21 x 2 = 42
Step 3: 38 + 42 = 74
Answer: Ms. Wilson will need to bake 74 cookies.
What is distributive property?
(aka the break apart method)
Distributive property says that you can multiply a number by a group of numbers added together by multiplying each number individually and then adding the products.
EX: 423 x 4 = (400 x 4) + (20 x 4) + (3 x 4)
Find the mistake.
9,654 x 4 = 38,416
The person solving did not regoup the extras from the hundreds place. The correct answer is 38,616.
Find the mistake.
98 x 23 = 2,154
The person solving did not regroup the extras in the tens place when multiplying by the 2 in the tens place. The correct answer is 2,254.
Mrs. Grooms and Ms. Moffett are planning a five-day cruise to Mexico. Mrs. Grooms has $400 to spend each day. Ms. Moffett has $356 to spend each day. How much money do they have all together for the entire cruise?
Step 1: $400 x 5 = $2,000
Step 2: $356 x 5 = $1,780
Step 3: $2,000 + $1,780 = $3,780
Answer: Mrs. Grooms and Ms. Moffett have $3,780 to spend on their cruise.