Commutative Property
2 X 6 = ___ X ___
6 X 2
7 X 6 = (5 X 6) + (____ X 6)
7 x 6 = (5 x 6) + (2 x 6)
Solve both:
7 + (6 + 4) =
(7 + 6) + 4 =
7 + (6 + 4) = 17
(7 + 6) + 4= 17
Tamara wants to buy a tablet that costs $437. She saves $50 a month for 9 months. Does she have enough to buy the tablet? Explain.
Yes she does. Tamara has a total of $450.
2 x 9 = 9 x ____
2
____ x 6 = 6 threes
3 X 6
9 x 6 = (5 + ___) x 6
9 x 6 = (5 + 4) x 6
Solve both:
(8 x 5) - 4 =
8 x (5 - 4) =
(8 x 5) - 4 = 36
8 x (5 - 4) = 8
Cara bought 9 packs of beads. There are 10 beads in each pack. She always uses 30 beads to make each necklace. How many necklaces can she make if she uses all the beads?
She can make 3 bracelets.
Complete the fact family below:
3 x 9 = ___
9 x ___ = 27
27 / 3 = ___
27 / ____ = 3
3 x 9 = 27
9 x 3 = 27
27 / 3 = 9
27 / 9 = 3
10 eights = 8 _____
8 Tens
Ronaldo solves 7 x 6 by thinking of it as (5 x 7) + 7. Is he correct? Explain
Yes, Ronaldo is correct. He needed to make 6 groups of 7 to solve. He made 5 groups of 7 first since 5 is an easy factor. Then, he added 7 for the last group.
Solve both:
(3 x 2) x 4 =
3 x (2 x 4) =
(3 x 2) x 4 = 24
3 x (2 x 4) = 24
Brad receives 5 cents for each can or bottle he recycles. How many cents does Brad earn if he recycles 48 cans and 32 bottles?
He would receive 400 cents or $4 if he recycled that many cans and bottles.
Mr. Lucas divides 28 students into 7 equal groups for a project. Write an equation where "n" represents the unknown and solve.
28 / 7 = n
28 / 7 = 4
n = 4
x x x x x x
x x x x x x
x x x x x x
What are two equations for this array?
6 X 3 = 18
3 X 6 = 18
Robert says that he can solve 6 x 8 by thinking of it as (5 x 8) + 8. Is he right? Explain.
Yes, Robert is correct. He needs to solve for six groups of eight, so he solves for five groups of eight then adds eight more. That totals six groups of eight.
Place parenthesis in this equation so that it equals 25.
4 x 7 - 3 = 25
(4x7) - 3 = 25
There are 60 seconds in 1 minute. How many seconds are in 5 minutes and 45 seconds?
There are 345 seconds in that amount of time.
Fill in the blanks for this skip count:
0, 9, ___, 27, 36, ___, 54, ___, 72, ___, 90
0, 9, 18, 27, 36, 45, 54, 63, 72, 81, 90
8 X 4 = 5 fours + _____ fours
3 fours
Ronaldo solves 7 x 6 by thinking of it as (5 x 7) + 7. Is he correct? Explain
Yes, Ronaldo is correct. He needed to make 6 groups of 7 to solve. He made 5 groups of 7 first since 5 is an easy factor. Then, he added 7 for the last group.
Is this equation true or false?
(10 - 7) x 6 = 18
Yes because 10 - 7 is three and 3 x 6 is 18.
Allen buys 9 packs of trading cards. There are 10 cards in each pack. He can trade 30 cards for a comic book. How many comic books can he get if he trades all his cards?
He can get 3 comic books if he trades his cards.
Dennis calculates 9 x 8 by thinking about it as
80 - 8 = 72. Explain Dennis' strategy.
Dennis used the multiple of ten since ten is a friendly factor. He then subtracted eight since he only needed nine groups of eight.