Frame the questions related to the given addition and subtraction facts

__Addition
and Subtraction.__

__1.
ADDITION__

__Recall__

a. 70 + 35 = __105__

b. 68 + 23 = __91__

c. 51 + 37 = __88__

d. 55 + 18 = __73__

e. 56 + 33 = __89__

f. 57 + 33 = __90__

g. 70 + 35 = __105__

** **

__Addition
of Three Digit Numbers (Without Regrouping)__

__Example :__ Add 132 and 241

So using abacus, first put 132 as:

then add 241, as 2 more in hundred, 4
more in tens and 2 more in ones.

**Answer of addition of
two or three numbers is called sum of the numbers.**

**sum = 373**

__Example :__ Add 342 + 515 + 12

**Sum** =
**869**

__Try this__

**Add the following
numbers.**

4. 34 + 452 + 3 = **489**

** **

__Addition
of Three Digit Numbers (With Regrouping)__

__Example :__ Add 556 and 194

**Add ones**

6 + 4 = 10 Ones = 1 Ten

With regrouping.

10 ones = 1 Ten + 0 ones

So, we put 0 in ones place and carry over
1 to ten place.

**Add Tens**

1 + 5 + 9 = 15 tens

15 tens = 1 hundred + 5 tens

So, we put 5 in tens place. And carry
over 1 to hundred place.

**Add hundreds**

1 + 5 + 1 = 7 hundred

So, we put 7 in hundreds place.

**Sum** = **750**

__Try this__

**Add the following numbers.**

d. 921 + 20 + 61 = __1002__

e. 28 + 195 + 6 = __229__

** **

__2. SUBTRACTION__

__ __

__Recall:__

a. 45 – 35 =
__10__

b. 87 – 69 =
__18__

c. 49 – 38 =
__11__

d. 99 − 55 =
__44__

** **

__Subtraction
of Three Digit Numbers (Without Regrouping)__

** Example:** Subtract 344 from 845

Now, remove 3 in hundred, 4 in tens
and 4 in ones as

**Answer of subtraction of
two numbers is called difference of the two numbers.**

**Difference** = **501**

** Example :** Subtract 213 from 735

**Difference** = **522**

__Try this__

**Subtract the following numbers.**

** **

__Subtraction
of Three Digit Numbers (With Regrouping)__

__ __

** Example :** Subtract 138 from 264

**Step : 1**

We cannot subtract 8 from 14. so
regroup 1 ten into 10 ones.

14−8=6

**Step : 2**

5−3=2

**Step : 3**

2−1=1

__Try this__

**Subtract the following
numbers.**

__Addition
and subtraction by using standard algorithm__

__Example:__

**Add 675 and 136**

**Step : 1**

Add ones:

5 + 6 = 11 ones,

11 ones = 1 tens + 1 one put 1 in ones
place and carry over 1 to ten place.

**Step : 2**

Add tens

1 + 7 + 3 = 11 tens ;

11 tens = 1 hundred + 1 tens. Put 1 in
tens place and carry over 1 to hundred place.

**Step : 3**

Add hundreds

1 + 6 + 1 = 8 hundreds put 8 in
hundreds place

**Puzzle : **I am a 3 digit number. If you add 5 tens with me, I will become
greatest 3 digit number Find me. __949__

**Teacher’s note :** Teacher can help the children to do the
Addition problems by using **abacus kit**.

__Example :__

**Subtract 386 from 724**

**Step :1**

Subtract ones

Borrow 1 ten from 2 tens then add to 4
ones we get 14 in one’s place.

14−6=8

**Step : 2**

Subtract tens

Borrow 1 hundred from 7 hundreds then
add to 1 ten we get 11 in ten’s place.

11−8=3

**Step : 3**

Subtract hundreds

6−3=3

**Difference** = **338**

**Play with numbers : **choose any 3 numbers Frame a 3− digit numbers
and reverse it. Find their sum and difference. __642 : 642+246 = 888;
642-246=396__

**Teacher’s note :** Teacher can help the children to do the
Subtraction problems by using **abacus kit**.

** **

__Daily life situation
involving addition and subtraction.__

__ __

__Example :__

a. 452 Mangoes are grown in farm A and
349 in farm B. Find the total number of mangoes grown in both farms.

Mangoes in farm A = __452__

Mangoes in farm B = __349__

Total number of
Mangoes = __801__

b. Amuthan saved rupees 125 on the
first day and rupees 200 in the second day. find the total amount saved by him
in two days

The first day saving = __125__

The second day saving = __200__

Total saving = __325__

c. Kumar earned rupees 800 in a day
and spent rupees 450. Find the amount saved by him?

His one day income = __800__

Amount spent = __450__

Savings amount = __350__

Frame questions for addition and
subtraction for the picture below. one is done for you.

Rani Chose 2 shirts from the hanger and 3 shirts from the rack. Find the total number of shirts chosen by him.

shirts from the hanger :
2

shirts from the rack : 3

2+3=__5__

** **

__Frame the questions
related to the given addition and subtraction facts__

__Examples :__

** 281 + 240 = **

A dairy booth sells 281 bottles of milk
on first day and 240 bottles of milk on second day. Find the total number of
bottles sold on both the days.

**352 ****– ****148 ****= ****? **

There are 352 oranges on a tree 148
oranges were plucked from the tree. How many oranges are remaining in the tree
?

__Try this__

There were 10 egg trays
each with 10 eggs in Valavan’s egg shop. He sold eggs in 3 trays and found that
eggs in 2 trays were rotten. Find the number of eggs reamining in valavan’s
shop.

Total number of eggs in
valavan’s shop =
** 100**.

Number of eggs sold +
number of eggs rotten =
** 30**
+

Number of eggs remaining
in the shop = __50__

__Practice__

Frame questions for the
given addition and subtraction facts.

__118____+____212____=____?__

**Mahendran has 118 pencils and 212 pens. How many items does he
have in total?**

__717−515= ?__

**Mahesh has Rs. 715. She spent Rs. 515.Then what is the remaining
money?**

__200____+____300____=____?__

**Anitha has 200 bombs and Karthi has 300 bombs. How many bombs do
they have in total?**

__169 + 243 = ?__

Savitha has 169 bananas and 243
custard apples. How many fruits does she have in total?

__150____−____50____=____?__

**MuthuMari has 150 orange, he sold 50 orange. How many orange
does he have in total.**

__500____−____355____=____?__

**Saminathan has Rs. 500, he gave Rs. 355 to his brother. How much
amount does he have?**

__999____−____199____=____?__

**Srinathan has 999 balls, he used 199 balls. How many balls does
he have?**

Tags : Numbers | Term 1 Chapter 2 | 3rd Maths , 3rd Maths : Term 1 Unit 2 : Numbers

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail

3rd Maths : Term 1 Unit 2 : Numbers : Addition and Subtraction | Numbers | Term 1 Chapter 2 | 3rd Maths

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