Vocabulary
What do we call the answer to an addition problem?
Sum
What is the sum of 10 and 10?
20
10 + 8 = ___
20 - 19 = ___
1
1 + x = 6. What is x?
x = 5
Is "take away" a key word for addition or subtraction?
Subtraction
Mr. Byrant creates 5 math problems. Ms. Sara creates 9 math problems. How many math problems do they create in all?
14 math problems
8 + 6 = ___
14
17 - 13 = ____
4
x - 2 = 4. What is x?
x = 4
Is "less than" a key word for addition or subtraction?
Subtraction
What is the difference between 8 and 5?
3
2 + 14= ___
16
19 - 8= ___
11
10 + x = 18. What is x?
x = 8
Is "In total" a key word for addition or subtraction?
Addition
Mr. Aden has 20 plants inside his house. He puts 15 of the plants outside. How many plants are left inside the house?
5 plants
4 + 6 = ___
10
17 - 8 = ___
9
3 + 15 = x. What is x?
x = 18
Is "altogether" a key word for addition or subtraction?
Addition
Ms. Hana and Ms. Christina have 12 pencils altogether. Mr. Levine has 16 pencils. How many more pencils does Mr. Levine have?
4
7 + 5 = ___
12
14 - 8 = ___
6
7 + x = 13. What is x?
x = 6