Subtraction
45-13=___
32
49+6=___
55
Ms. McGuire had 45 pieces of candy. Ms. Morton had 49 pieces of candy. How many pieces did they both have?
Did you have to add or subtract?
What was the word that told you to add or subtract?
add
word: both
Write four math facts for these 3 numbers:
22, 12, 34
22+12=34
12+22=34
34-12=22
34-22=12
List 3 addition words you may see in a word problem.
any words that have to do with addition
89-73=___
16
74+54=__
128
Did you have to add or subtract?
What was your key word?
6 students were absent
subtract
word: absent
Write four math facts with these three numbers:
10,8,2
8+2=10
2+8=10
10-8=2
10-2=8
Name 3 subtraction words you could see in a word problem.
Any words that tell you to subtract
81-48=__
33
81+38=___
119
Ms. Davis' goal was to drink 32 ounces of water a day. By lunch, Ms. Davis had drank 19 ounces of water. How many ounces does Ms. Davis have left to drink?
Did you have to add or subtract?
What was your key word?
13 ounces
Subtract
key word: left
Write four math facts with these three numbers:
15, 9, 6
6+9=15
9+6=15
15-6=9
15-9=6
Label the numbers of this problem:
8+4=12
addend, addend, sum
21-16=___
5
66+14=
80
Maliyah and Ronald wanted to have lunch at McDonald's with their friends. Maliyah invited 13 of her friends and Ronald invited 16 of his friends. What was the total number of people that Maliyah and Ronald invited?
Did you have to add or subtract?
What was the key word?
29 people
Add
Key word: total
Write four math facts for these three numbers:
20,7, 13
13+7=20
7+13=20
20-7=13
20-13=7
an answer to an addition problem.
94-62=___
32
37+34=
71
Last week Mrs. Lewis' goal was to sell 32 pumpkins. By Wednesday she had only sold 22 pumpkins. How many more pumpkins does Mrs. Lewis have left to sell?
10 pumpkins
Write four math facts with these three numbers:
18,5,13
13+5=18
5+13=18
18-13=5
18-5=13
What is commutative property?