Vocabulary
Define partial product and product.
Product is the answer to a multiplication problem. Partial products are parts of the answer to a multiplication problem, but not the whole answer.
9 x 4 =
9 x 40 =
9 x 400 =
9x 4,000=
36
360
3,600
36,000
What is the missing factor?
6 x ? = 264
44
A new two-seater car weighs 1,785 pounds. About how much would 8 of the two-seater cars weigh? Estimate.
About 16,000 pounds
What is the distributive property of multiplication?
Breaking apart numbers in order to multiply them.
185 x 3 =
555
What are the partial products for 228 x 7?
56, 140, 1,400
Last year, John's dad gave him 24 silver coins and 56 gold coins to start a coin collection. Now John has seven times as many coins in his collection. How many coins does John have in his collection?
Show your work.
560 coins
What is an array?
Rows and columns of blocks that represent an equation.
568 x 6 =
3,408
4,261 x 3 =
12, 783
Kyle has a rock collection. On Monday, he found 16 new rocks. On Tuesday, he gave away 9 rocks to his friends. After giving away the rocks, Kyle had 122 rocks left in his collection. How many rocks did Kyle have to start with?
16 - 9 = 7
122 - 7 = 115 rocks
What is the associative property of multiplication?
States that you can change the grouping of the factors and the product stays the same.
8,548 x 9 =
76,932
How can you use compensation to solve
99 x 5?
100 x 5 = 500
1 x 5 = 5
500 - 5 = 495
Tonya's bakery bakes 729 pies and 23 cakes every hour. How many baked goods are baked in 7 hours?
729 + 23 = 752
752 x 7 = 5,264 baked goods
What is the communitive property of multiplication?
States that you can change the order of the factors but the product stays the same.
9,999 x 9 =
89,991
42, 331 x 6 =
253, 986
Mrs. Smith has a library with 948 books on each shelf. If she has 6 shelves, how many total books does Mrs. Smith have in her library? Draw a bar diagram and write and solve an equation. Show your work.
948 x 6 = b
b = 5, 688 books