Order of Operations
15 X 2 + 3 X 4 - 16
26
This states that multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products.
distributive property
Write a comparison sentence for
5 X 9 = 45
____ times as many as ___ is ____
5 times as many as 9 is 45
Maddox has 4 boxes with 32 marbles in each box. He has 7 boxes with 18 shells in each box. If he gets 20 marbles from a friend, how many marbles and shells does he have?
274 marbles and shells
75 X 5
375
8 X 42 + 3 X 59 - 62
451
A number multiplied by another number to find a product is called a
factor
9 times as many as 4 is ______
36
Trina has 2 bags with 14 pinecones in each bag. She has 7 boxes with 15 acorns in each box. If she trades 5 pinecones for 10 acorns, how many pinecones and acorn does she have?
138
Use expanded form to solve
5 X 64
320
5 X 60 = 300
5 X 4 = 20
300 + 20 = 320
6 X 27 + 2 X 47 - 83
173
partial product
35 is ____ times as many as 5
7
146
4 X 18 X 25
1,800
3 X 22 + 7 X 41 - 24
329
This states that you can change the order of the factors to multiply the factors that you know first
commutative property
Write a comparison sentence
54 = 6 X 9
54 is 6 times as many as 9
Pineview has 3 4th grade classrooms. Each classroom has 14 tables. Two students sit at each table. About how many students are there in all?
About 60
3 X 14 X 2
1,592 X 6
9,552
What's the error in the following:
5 X 12 + 4 X 20 - 15 = n
60 + 4 X 20 - 15=n
64 X 20 - 15 =n
1,280 - 15 = n
1,265 = n
they did not follow the order of operations
When you try to determine about how much something may be you do this
estimate
Write a comparison sentence.
5 X 64 =
5 times as many as 64 is 320
Maggie has 3 binders with 25 stamps in each binder. She has 5 binders with 24 baseball cards in each binder. If she gives 35 stamps to a friend, how many stamps does she have left?
160 stamps and cards
4 X 6 X 50
1,200