Name that Expression
Which expression represents the drawing that Mrs. Vilary drew on the board?
A. 1 x 30 B. 1 x 6 +2
C. (1x6) + (5x6) D. (6x6) + (1x5)
(1 row of 6 and 5 rows of 6 are circled in groups on the board)
Answer is C
Which expressions can be used to find 8x4? Choose all the correct answers.
A (8x3) + (8x1) B (3x4) + (5x4)
C (1x4) + (6x4) D (8x4) + (8x1)
E (8x2) + (8x2) F (1x2) + (7x2)
A, B, E
C is not correct (7x4)
D is not correct (8x5)
F is not correct (8x2)
Lori wants to find the product of 4 x 6 by breaking 4 apart. Complete and solve her equation. (2 x 6) + (_____ x 6) = ______
(2 x 6) + (2 x 6) = 24
Lori breaks 4 x 4 apart into (4x1) + (4x3) to solve a problem. Write and solve a different equation that breaks apart 4 x 4.
4x4 = (4x2) + (4x2) = 8+8 = 18
Lori has 3 packs of cookies. There are 6 cookies in each pack. How many cookies does she have in all? Write and solve an equation that breaks apart one factor. Show your work!
3 x 6 = (1 x 6) + (2 x 6) = 6 + 12 = 18
OR
3 x 6 = (3 x 1) + (3 x 5) = 3 + 15 = 18
18 cookies
Which expression represents the drawing that Mrs. Vilary drew on the board?
A. 3 x 4 +2 B. 7x2
C. (2 x 3) + (2 x 4) D. (3 x 2) + (4 x 2)
(3 rows of 2 and 4 rows of 2 are circled in groups on the board)
Answer is D
Which expressions can be used to find 5x9? Choose all the correct answers.
A (5x8) x (5x1) B (3x9) + (2x9)
C (4x9) + (2x9) D (5x7) + (5x3)
E (5x5) + (5x4) F (3x4) + (2x5)
B, E
A is not correct - not distributive property (multiplication)
C is not correct (6x9)
D is not correct (5x10)
F is not correct - have to have the same number of rows (groups) or columns (number in each group)
Lori wants to find the product of 3 x 6 by breaking 6 apart. Complete and solve her equation. (3 x _____) + (3 x 5) = ______
(3x1) + (3x5) = 18
Lori breaks 3 x 7 apart into (3x4) + (3x3) to solve a problem. Write and solve a different equation using known facts that breaks apart 3 x 7.
(1x7) + (2x7) = 7 + 14 = 21
OR
(3x2) + (3x5) = 6 + 15 = 21
Lori has 6 boxes of donuts. There are 7 donuts in each box. How many donuts does she have in all? Write and solve an equation that breaks apart one factor. Show your work!
6x7= (1x7) + (5x7) = 7 + 35 = 42
OR
6x7 = (6x2) + (6x5) = 12 + 30 = 42
42 donuts