1st Grade - Addition, Subtraction And Equal Signs

 
     
 
     
 
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1st
Addition and Subtraction
Addition, Subtraction and Equal Signs
Understand the meaning of the symbols +, -, and =.
The student will understand the meaning of the following symbols; + (to add), - (to subtract), and = (equals).
 

Sample Problems

(1)

If you see this sign (+) in a number sentence, what do you do? (add)

(2)

If you see this sign (-) in a number sentence, what do you do? (subtract)

(3)

What does this symbol mean (=)? (equal)

(4)

Circle the equal sign in this problem: 1+3=4

(5)

Circle the sign that tells you to subtract. + - =

Learning Tips

(1)

Flashcard Fun: For this activity you can make your own flashcards using blank index cards. On several cards make an addition sign (+). On other cards make the subtraction sign (-). You will also need to make flash cards with the equals sign (=). On other index cards you will need to make problems (both addition and subtraction) that do not contain the operation sign in the middle of the problem, but do include the answer. (ex: 3__ 1 = 4) Help your child to practice with the flashcards. The first level of this activity would be to just use the +, -, and = cards. Once your child is able to successfully identify the signs and what they mean, you may move to the next set of cards (missing the operational sign in the middle of the problem). For this portion of the activity, they can use a whiteboard to copy down the problem, and then attempt to work it out, so that they can identify which sign is missing.

(2)

Whiteboards: For this activity your child will need a whiteboard, markers, and an eraser. You will verbal say a problem to your child such as, 3+4=7. Your child will need to write down the problem that you say and then identify if it addition or subtraction, along with how they know which operation to perform. You can change the activity by leaving out certain parts of the problem (ex: 3__4=7). You would then ask your child to fill in the missing portion of the problem and identify what it is.

(3)

Around the World: For this activity you can reuse the flashcards you made from the “Flashcard Fun” activity. For this event you will need multiple players, so invite the entire family to get involved. Have everyone sit down in a circle. One person will get up and stand behind another (this will be the starting point). A flashcard will be shown to the two players (the one sitting with the person standing behind them), only one of these two players may answer. Whoever answers the flashcard correctly, first, will move on the next player and stand behind them. If one person goes all the way around the entire circle, they have “gone around the world” and they win that round of the game.

(4)

Bag Sort: For this activity you will need to have 2 small brown paper lunch bags. In one bag you will need to have number cards. Each card should be small enough to manipulate and the bag should contain more than one of each number. In the other bag you will have multiple cards that have the operational symbols for addition and subtraction (+ and - ), along with multiple equal signs. You can play this game a couple of different ways. First, you can verbally give your child a specific problem and then they must create the problem using the manipulative cards from the bags. You may also ask them to create a specific type of problem (addition or subtraction) and allow them the freedom to generate the numbers themselves. The children can also “be the teacher” and give you problems. They will then need to check your work which will also reinforce this skill.

(5)

Traffic Sign: For this activity, you will need to make a large “stop” sign. Instead of having the word stop in the middle you will have an addition sign on one side and a subtraction sign on the other side. You will ask your child to be the mathematics police. You will explain that it will be their job to decide if a problem you show them should have an addition or a subtraction sign. You may use the flashcards from the “Flashcard Fun” activity to play the game. When you show your child a flashcard that is missing the operational sign, they will need to solve the problem to determine if they need to add or subtract. They will indicate if it is an addition or subtraction problem by showing the sign side (+or -) that corresponds to the problem.

Extra Help Problems

(1)

Circle the sign that tells you to add. + - =

(2)

If I want to add two numbers together, which symbol will I use? (+)

(3)

If I want to subtract two numbers, what symbol will I use? (-)

(4)

What symbol do I use when I am going to show the answer to an addition or subtraction problem? (=)

(5)

Create a problem that shows addition. Draw a picture to match.

(6)

Fill in the missing sign.

3___ 9 =12 (+)

(7)

Fill in the missing sign.

11___ 4 = 7 (-)

(8)

Fill in the missing sign.

1+2 ___ 3 (=)

(9)

Fill in the missing sign.

11____ 8 = 19 (+)

(10)

Fill in the missing sign.

27___ 6 = 21 (-)

(11)

Create a problem that shows subtraction. Draw a picture to match.

(12)

Create a problem that shows addition. Draw a picture to match.

(13)

Fill in the missing sign.

11+4___ 15 (=)

(14)

Fill in the missing sign.

8 ___ 7 = 15 (+)

(15)

Fill in the missing sign.

33 ___ 22 = 11 (-)

(16)

Fill in the missing sign.

22+5___ 27 (=)

(17)

Fill in the missing sign.

61 ___ 5 = 66 (+)

(18)

Create a problem that shows addition. Draw a picture to match.

(19)

Create a problem that shows subtraction. Draw a picture to match.

(20)

3 ___ 4 = 7

  1. +

  2. =

(21)

5 ___1 = 4

  1. +

  2. =

(22)

9+4 ___ 13

  1. +

  2. =

(23)

8__ 11 = 19

  1. +

  2. =

(24)

47___5= 42

  1. +

  2. =

(25)

6 +7 ___ 13

  1. +

  2. =


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