Vocabulary
What do we call the answer to an addition problem?
Sum
What is the sum of 10 and 10?
20
10 + 11 = ___
21
20 - 19 = ___
1
1 + x = 6. What is x?
x = 5
Is "take away" a key word for addition or subtraction?
Subtraction
Mr. Ivan creates 5 math problems. Ms. Madeline creates 15 math problems. How many math problems do they create in all?
20 math problems
89 + 11 = ___
100
37 - 23 = ____
14
x - 2 = 4. What is x?
x = 4
Is "less than" a key word for addition or subtraction?
Subtraction
What is the difference between 22 and 10?
12
21 + 32 = ___
53
29 - 18 = ___
11
10 + x = 35. What is x?
x = 25
Is "In total" a key word for addition or subtraction?
Addition
Ms. Dahana has 30 plants inside her house. She puts 15 of the plants outside. How many plants are left inside the house?
15 plants
42 + 26 = ___
68
59 - 36 = ___
43 + 15 = x. What is x?
x = 6
Is "altogether" a key word for addition or subtraction?
Addition
Rayan and Lexi have 40 toys altogether. Trey has 52 toys. How many more toys does Trey have?
12
74 + 25 = ___
99
67 - 28 = ___
39
57 + x = 63. What is x?
x = 6