ADDITION - ADDING ONE TO FIVE OR MORE DIGIT NUMBERS, WORD PROBLEMS, EXAMPLES, EXERCISES

Learn/Teach Addition through Fun Games and Activities. For details, see near the bottom of this page.

Please study about the base-10 number system or
Decimal Number System, if you have not already done so.

There, we have seen successor numbers to a given number.

Successor number is nothing but the number obtained by adding 1 to the given number.

We have seen the base symbols or characters or digits of the decimal system as 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

You need to remember these digits in order and their names.

In these digits, each digit is 1 added to the previous digit.

The symbol for adding is +. So, we can say, 0 + 1 = 1; 1 + 1 = 2; 2 + 1 = 3; 3 + 1 = 4; 4 + 1 = 5; 5 + 1 = 6; 6 + 1 = 7; 7 + 1 = 8; 8 + 1 = 9.

Now suppose I ask you, what is 0 + 2 ? or find the values of 1 + 2, 2 + 2, 3 + 2, 4 + 2, 5 + 2, 6 + 2, 7 +2.

Can you do that ?

In stead of adding 1, we are adding two here.

To perform these additions, you may use your fingers. Close your fingers first.

Example 1 of Addition :

Find 1 + 2.

To add 2 to 1, open two fingers from your closed fingers.

Start counting after 1 (to which we are adding), and close one of your opened fingers for every count.

so, you say two and close one of the opened fingers. Say three and close the remaining finger.

Now all fingers are closed. The last said number, three, is the answer.

So 1 + 2 = 3.

Example 2 of Addition :

Similarly what is 5 + 2 ?

Open two fingers and start counting after 5 (to which we are adding) and close one of the fingers for each count.

Thus you will count six and close one finger and then count seven and close the other finger. Now all fingers are closed. The last said number, seven, is the answer.

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Now I ask you how much added to 3 wiil give 7. In other words, fill in the blank 3 + --- = 7.

Here also you have to close all your fingers first. To solve this question, you have to start counting after 3 (to which some thing is to be added) by rising one finger for each count till you get the count equal to seven (the value present on the right hand side of equal to symbol).

You start saying four and rise one finger. Then say five and rise another finger. Then say six and rise one more finger. Then say seven and rise another finger. This is the last step, since seven is reached.

Now, count the raised fingers which are 4. So the answer in the blank is 4. Ans

Let us see one more example.

Example 4 of Addition :

Fill in the blank --- + 4 = 9

Whether the blank is first or second, the procedure is same.

Here also you have to close all your fingers first. To solve this question, you have to start counting after 4 (to which some thing is to be added) by rising one finger for each count till you get the count equal to nine (the value present on the right hand side of equal to symbol).

You start saying five and rise one finger. Then say six and rise another finger. Then say seven and rise one more finger. Then say eight and rise another finger. Then say nine and rise another finger. This is the last step, since nine is reached.

Now, count the raised fingers which are 5. So the answer in the blank is 5.

Exercise 1B : single digit numbers' addition

Fill in the Blanks.

--- + 6 = 9

3 + --- = 6

5 + --- = 8

--- + 9 = 9

4 + --- = 8

--- + 4 = 6

--- + 3 = 4

6 + ---- = 9

--- + 1 = 3

3 + --- = 5

For Answers see at the end of the page.

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