I can . . .ADD & SUBTRACT

A math lesson for Ms. Saxman’s 1st Grade Class

Do you want to. . .

ADD SUBTRACT

AdditionAddition is putting together numbers to see how many

there is in all. You can add numbers and objects. This is the addition sign + it is also known as a plus sign. Look at the examples below and notice that the order of the numbers in the problem doesn’t

matter, you get the same answer both ways.

2+3=53+2=5

More About AdditionAs a beginner, you might find it helpful to use a

number line. A number line is a line of numbers. To use it for addition, start out at the first number in

the problem and count forwards the second number in your problem. The number you land on is the

answer to your problem. In this case we start out with 2, go forward 3, and end up on 5, our answer.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

2 + 3 = 5

START

Practice AdditionUse the number line to figure out the right answers, then

click on the equal sign = at the end of each problem to check your work

1. 2+2

2. 4+3

3. 2+4

1 2 3 4 5 6 7 8 9 10

SubtractionSubtraction is taking away objects from groups and

finding out how many is left. You can subtract numbers or objects. This is the subtraction sign –

it is also known as the minus sign. Look at the examples below and notice that the order of the numbers in the problem does matter, and unlike

addition you won’t get the same answer both ways.

7 – 4 = 3

4 – 7 = -3

More About SubtractionAs a beginner, you might find it helpful to use a number line. A number line is a line of numbers.

To use it for subtraction, start out at the first number in the problem and count backwards the

second number in your problem. The number you land on is your answer. In this case we start

out with 7, go backwards 4, and end up on 3, our answer.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

7 – 4 = 3

START

Practice SubtractionUse the number line to figure out the right answers, then click on the equal sign = at the

end of each problem to check your work

1. 8 – 2

2. 6 – 3

3. 4 – 0

1 2 3 4 5 6 7 8 9 10

AZ Math StandardsStrand 1: Number and Operations

Concept 2: Numerical OperationsPO 1. Understand and apply numerical

operations and their relationship to one another.

PO 3. Develop and use multiple strategies for addition facts to 10+10 and their related subtraction facts.

AZ Technology Standards

STANDARD 1: Fundamental Operations and Concepts

Students understand the operations and function of technology systems

and areproficient in the use of technology.

NETS*T1. Facilitate and Inspire Student Learning and

CreativityTeachers use their knowledge of subject matter,

teaching and learning, and technology to facilitate experiences that advance student

learning, creativity, and innovation in both face-to-face and virtual environments. Teachers:

d. model collaborative knowledge construction by engaging in learning with students, colleagues, and others in face-to-face and virtual environments

Information Literacy Standards

Information technology skills enable an individual to use computers, software applications, databases, and other technologies to achieve a wide variety of academic, work-related, and personal goals.

Information literate individuals necessarily develop some technology skills.

Teacher Instructions This activity is lined with content, technology,

and information literacy standards

AZ Math Standards

AZ Tech Standard

s

NETS*T

Information Literacy

Standards

Begin Tutorial

Exit Tutorial