Basic Addition By: Shannen Alliah M. Edmilao & Danielle Lauron

CountingOne 1 Two 2Three 3Four 4Five 5

SixSevenEightNineTen

AdditionAddition is…

…bringing two or more numbers (or things) together to make a new total.

Here a 1 flower is added by another 1 flowerWhich makes 2 flowers.

In word it is “one plus one equals two.”

1 + 1 = 2+ =

Whole NumbersAddition

• Number Line- show numerals in order of the value.

0 1 2 3 4 5 6

• Adding on the number line. (2+3=5)

0 1 2 3 4 5 6

2 + 3 = 6

Whole Numbers

• Adding with Pictures

+ =

Addition of Whole Numbers

Set ModelTo find “2+3”, one with two object and the other with three object, from their union, and count the total

Measurement ModelIn this model, the addition is performed on a number line.For example, to calculate 3+4.

1.) draw an arrow with length 3 starting at 0.

2.) draw an arrow with length 4 starting from the end of the previous arrow.

3.) the sum is then the length of the two arrows combined together this way.

0 1 2 3 4 5 6 7 8 9

Count From A Number UpwardsExample: 6+3

Think “6…7,8,9”

Jump StrategyYou can also count by 2s or 10s, or make any “jumps” you want to help

you to solve a calculation.

Example: 4+12

Think “4…14,15,16”

1 2 3 4 5 6 7 8 9 10

4 5 6 7 8 9 10 11 12 13 14 15 16

Alternative number line model for additionIn this model, a bunny is sitting above the number 0 (which is the home base) facing right (which is the positive direction), and will jump forward if it has to perform an addition problem.

1 2 3 4 5 6 7

Example : 2 + 41. Our rabbit starts at 0 facing right.

2. It then hops forward 2 units because it sees 2 in the beginning.

0 1 2 3 4 5 6 7

Example : 2 + 41. Our rabbit starts at 0 facing right.

2. It then hops forward 2 units because it sees 2 in the beginning.

0 1 2 3 4 5 6 7

Example : 2 + 41. Our rabbit starts at 0 facing right.

2. It then hops forward 2 units because it sees 2 in the beginning.

0 1 2 3 4 5 6 7

Example : 2 + 41. Our rabbit starts at 0 facing right.

2. It then hops forward 2 units because it sees 2 in the beginning.

0 1 2 3 4 5 6 7

Example : 2 + 41. Our rabbit starts at 0 facing right.

2. It then hops forward 2 units because it sees 2 in the beginning.

0 1 2 3 4 5 6 7

Example : 2 + 41. Our rabbit starts at 0 facing right.

2. It then hops forward 2 units because it sees 2 in the beginning.

0 1 2 3 4 5 6 7

Example : 2 + 41. Our rabbit starts at 0 facing right.

2. It then hops forward 2 units because it sees 2 in the beginning.

0 1 2 3 4 5 6 7

NamesOther names for Addition are:

• Sum• Plus• Increase • Total

And the numbers to be added together are called the “Addends”:

8+3=11Addend Addend Sum

Adding numbers with two digits• Adding numbers with 1 digit is pretty straight forward.• In general, you can do it mentally or use your fingers.• Adding zero to a number never changes the number.

For Addition Step 1: Add the one’s place number and take the carry to the next step.

Step 2: Add the ten’s place number and also add the carry and over the new carry to the next step. Continue this process for every place in the given number.

Handy Rules of Addition:a.) add the following column. If this column contains only one digit, we just write that digit under the column we are adding.b.) we need to go on to the next column and repeat the same procedure.

Above, we add the ones column first. Then, we carry over the tens to the tenth column. The 1 that we carry over has place value of 10. However, there is no need to write 10 because we saw before in place value putting a 1 here in the tens place means that there is ten.

1 3 6 +1 7--------------- 5 3

6+7=13

1 5 6 + 4 6---------------- 104

8+6=14

A man sold 230 pineapple at a fruit stand in the morning. He sold another 86 balloons in the evening.

a.) How many balloons did he sell in all?

230 86 Morning Afternoon

?

A man sold 230 pineapple at a fruit stand in the morning. He sold another 86 pineapple in the evening. How many did he sell at all?

Hundreds Tens Ones

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