3rd Grade Maths

Introduction to 3rd grade maths:

3rd grade mathematics covers operations like addition, subtraction, multiplying and division the numbers. They also learn the word problem of addition, subtraction, multiplying and division,four digit numbers and their place values, successor and predecessor etc. We will see some examples from 3rd grade mathematics.

Tutoring on Addition for 3rd Grade Math Homework

Like two digit numbers we will start to add the numbers from left side. First, we will add ones, then tens, then hundred and at last thousand.

Example: 2 4 5 6

+ 2 5 6 3

5 0 1 9

Home work for practice:

(a)    4915 + 3456 =

(b)   2456 + 6754 =

(c)    1345 + 4326 =

(d)    1298 + 4264 =

(e)     3427 + 6743 =

Answer: (a) 8371 (b) 9210 (c) 5671 (d) 5562 (e) 10170

Word problems:

(a) In a city there are 140 shops of toys, 200 shops of grossary items and 300 shops of fancy dresses. Find out the total number of shops?

(b)   A shopkeeper sold 700 greeting cards in one year and 650 cards in the next year.     How many cards did he sell in two years?

Solution: (a) Number of toy shops in a city = 140

Number of grossary shops        = 200

Number of fancy dresses shops = 300

The total number of shops are = 140 + 200 + 300

= 640 shops Ans.

Solution (b) Number of greeting cards sold in one year = 700

Number of greeting cards sold in next year = 650

The total number of cards sold in two years = 700 + 650 = 1350

1350 cards Ans.

Tutoring on Subtraction for 3rd Grade Math Homework

To subtract the numbers, always subtract lowest number from the highest number.

Example: Subtract 214 5 from 5478

5 4 7 8

- 2 1 4 5

3 3 3 3

Home work practice:

(a)    5675 – 3241 =

(b)   3678 – 1625 =

(c)    6666 – 2323 =

(d)   9567 – 2235 =

(e)    7 883 – 2378 =



Answer: (a) 2434 (b) 2053 (c) 4343 (d) 7332 (e) 5505

Word problems :

(a) The cost of one bicycle is 2000 and other bicycle is 4500. What is the difference between their cost?

(b) What should be added to 2340 to get 5000?

Answer: (a) Cost of one bicycle is = 2000

Cost of other bicycle is = 4500

Difference between their costs = 4500 – 2000

= 2500 Ans.

(c)    First we subtract 2340 from 5000

5000 – 2340 = 2660

2340 – 2660 = 5000

Number should be added 2660 Ans.

Inverse Operations Addition and Subtraction

Introduction :

The addition is the basic process in arithmetic’s. The addition   process is to add the two numbers and give the combination of that number. Summation the arithmetic process of summing calculating the sum of two or more numbers. A part that is added to something to improve it; the subtraction process is inverse of the addition A component that is subtracted to something to reduce it.

Explanation of Inverse Operations Addition and Subtraction

Addition:

The addition process is the main function in the arithmetic. The simple and effective process. Every function is based on the addition.

We will learn the addition process in simple way.

Here will explain the concepts.

Ex:

The two apple is added to four apple finally what will be the out put of the problem.

Sol:

Step1: First, add   two apples to four apples.

Step2: 2 + 4

Step3: the final out put 6. The output will changed for the reason combination of two quantities.

\Subtraction:

The subtraction is the inverse of the addition process. This process is reducing the total quantities.

We will learn the basic process of subtraction method.

Ex:

The six apples in the one bag. Ram already took two apples in the bag. What will be the remaining apples in the bag?

Sol:

The subtraction method is opposite of the addition process. This process reduce the total quantities,

Step1: the total quantities are 6 apples.

Step2: the ram took apples are 2

Step3: So, total apples – ram took apples= final quantities

Step4:6-2=4. Final apples are 4.

Practice Problems on Inverse Operations Addition and Subtraction

Ex:1 Ravi had 3 oranges and raja have 4 apples and 2 oranges. What are the total apples and oranges both have solve this problem?

Sol: 5 oranges and 4 apples

Ex:2 Ravi had 4 pens and 3 books, raja have 4 pencil and 2books. What are the total books, pens and pencil both have solved this problem?

Sol :5 books,4 pens,4 pencils