3's fact
Find 3 x 8 using the distributive property.
(2 x 8) + (1 x 8) = 16 + 8 = 24
Find 4 x 7 using the distributive property.
(2 x 7) + (2 x 7) = 14 + 14 = 28
Find 6 x 8 using the distributive property.
(3 x 8) + (3 x 8) = 24 + 24 = 48
Find 7 x 9 using the distributive property.
(5 x 9) + (2 x 9)= 45 + 18 = 63
Find 8 x 4 using the distributive property
(8 x 2) + (8 x 2) = 16 +16 =32
How can 3 x 9 help you find 9 x 3?
The commutative property says that i can multiply factors in any order and get the same product. So, 3 x 9 = 27 and thus 9 x 3 = 27
Ramona has 9 candy boxes with 4 chocolate-covered strawberries in each. How can she find how many strawberries she has in all?
She can do (2 x 9) and double it, so 18 + 18 = 36
Chrissy has 18 slices
Marge says that 7 x 0 is the same answer as 7 + 0. Is she correct?
No she is not. The zero properties of addition and multiplication are different.
Ben has a 2 x 8 array. He wants to have a 5 x 8 array. What array does Ben need to add in order to have a 5 x 8 array?
He needs to add a 3 x 8 array because (3x8) + (2x8) = 5 x 8
Use the associative property to solve 3 x 3 x 6
54
Use the associative property to find 4 x 4 x 2
32
Use the associative property to solve 6 x 2 x 3
36
42
Use the associative property to find 8 x 4 x 2
64
Janet broke up an array for 6 x 3 into two smaller arrays. Both of his new arrays are the same. What were the two arrays?
(3x3) + (3x3)
Janet broke up an array for 7 x 4 into two smaller arrays. Both of his new arrays are the same. What were the two arrays?
(7x2) + (7x2)
Allison bought 10 packages of energy bars. Each package contains 6 bars. She says she has 65 bars. Is her answer reasonable?
No, because all multiples of 10 have a 0 in the ones place.
Anita says the product of 7 x 3 x 2 is less than 30. Do you agree? Explain.
No, because 7 x 3 is 21, which is less than 30. But then you have to multiply that by 2, which is 42 and that's more than 30.
Ann broke up a large array into two smaller arrays. The two smaller arrays are (1 x 8) and (4 x 8). What was the larger array that Ann started with?
5 x 8
Jake has 3 vases. She wants to put 10 flowers in each vase. He bought enough flowers for 2 vases. How can Jake use (2 x 10) to help him figure out how many more flowers he needs?
He can use (2 x 10) + (1 x 10) to find the total number of flowers, which is 30.
Zach knows 2 x 8 = 16. How can he use this to help him find 4 x 8?
He can double 2 x 8 to find 4 x 8 because 4 is a double of 2.
5 x 5 x 6 = 5 x 30 =150 trains in all
Use repeated reasoning to solve 7 x 3, 7 x 4, and 7 x5.
I can break the 7 in to 5 and 2 each time. Or I can continue to add 7 on to each previous product.
Jamie has 8 boxes of candy. Inside each box there are 6 rows with 2 pieces of candy in each row. How many pieces of candy does Jamie have in all?
8 x 6 x 2 = 48 x 2 = 96 pieces of candy