Math Sentence For Kids

Introduction to word problems:

Word problems are sentences describing a mathematical question.  It is an alternative method of expressing different mathematical problems. Word problems are simple sentences mainly used to explain a practical situation where mathematical operations or application is used.

Few important words used in word problems are :

Sum, altogether ------  all stands for  `addition (+)`
Substract, take away, left over -----all  stands for ` minus (-)`
Times, product -------- all stands for `"multiply" ( * )`
A simple way to explain addition or substraction to kids is by forming simple sentences. Kids can relate more easily to simple sentences than mathematical symbol.

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Simple word problems on addition:


Ex 1: Mary had 3 cookies.  John had 5 cookies. How may cookies do they have altogether?

Sol: Step 1:  First we will try to find the word which describes mathematical operation

In this question, word is "altogether", means we have to perform addition

Step 2:  Mary -------- 3 cookies

John --------- 5 cookies

Step 3: Total -------  Add 3 and 5

So,  3 + 5 = 8 cookies

Ex 2: Alice had 2 pencils.  Her mother gave her 3 pencils.  How many pencils do Alice altogether?

Ans: Alice has 5 pencils

Ex 3: In a box, there are 5 candies. If Joe put 8 more candies in the box, then how many candies are there in the box altogether?

Ans:  There will be 13 candies in the box altogether


Simple word problems on subtraction:


Ex 1: Matt had 10 oranges.  He made juices out of 6 organes then how many oranges are left?

Sol: Step 1: First we will try to find the word which describes mathematical operation

In this question, word is "left", means we have to perform subtraction

Step 2:  Matt had 10 oranges

6 oranges were used for taking juice

Step 3:  10 - 6 = 4

Remaining will be 4 oranges

Ex 2: 15 posters were pasted all over the school. If 5 were removed, then how many were left?

Ans:  10 posters

Ex 3: Sally had 8 dolls.  She gave 3 dolls to her cousin.  How many dolls does Sally have left?

Ans: 5 dolls

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Simple word problems on multiplication:


Ex:  Cost of one banana is $ 5. Jack buys 3 bananas. What is the total cost of 3 bananas?

Cost of 3 bananas is $ 15

Ex 2:  What is the product of 5 and 6?

Ans: 30

Ex 3:  Mike's paper boat measures 2 inches. Mike's dad makes a paper boat 4 times bigger than Mike's. What is the measure of dad's boat?

Ans:  Dad's boat is 8 inches.

Deference in Math

Introduction to difference in math:

In mathematics, difference or subtraction is one of the four basic arithmetic operations; it is the inverse of addition operation, meaning that if we start with any number and add any number and then subtract the equal number we added, we return to the number and we started with. Subtraction or difference is denoted by a minus sign in infix notation.

The traditional names for the parts of the formula,

a − b = c,

are minuend (a) − subtrahend (b) = difference (c). Instead we say that a and −b are terms, and treat subtraction as addition of the opposite. The answer is called difference.

(Source from Wikipedia)

Example Problems for Difference in Math:

Example 1:

Find the difference value of the given numbers, using subtraction operation, 100 and 80.

Solution:

Given numbers using subtraction operation for, 100 - 80

We are going to subtract the two numbers,

100 - 80 = 20

The difference of given number is 20

Example 2:

Find the difference value of the given numbers, using subtraction operation, 550 and 200.

Solution:

Given numbers using subtraction operation for, 550 - 200

We are going to subtract the two numbers,

550 - 200 = 350

Finally we get the difference answer for given numbers are 350.

Example 3:

Find the difference value of the given numbers, using subtraction operation, 235 and 647.

Solution:

Given numbers using subtraction operation for, 235 - 647

We are going to subtract the two numbers,

235 - 647 = -412

The difference of given number is  -412.

Example Decimal Problems for Difference in Math:

Example 4:

Find the difference value of the given decimal numbers, using subtraction operation, 6.5 and 2.6.

Solution:

Given decimal numbers using subtraction operation for, 6.5 – 2.6

We are going to subtract the two numbers,

6.5 – 2.6 = 3.9

The difference of given decimal number is 3.9

Example 5:

Find the difference value of the given decimal numbers, using subtraction operation, 20.865 and 15.358.

Solution:

Given decimal numbers using subtraction operation for, 20.865 – 15.358

We are going to subtract the two numbers,

20.865 – 15.358 = 5.507

The difference of given decimal number is 5.507.

Example 6:

Find the difference value of the given decimal numbers, using subtraction operation, 3.4 and 9.7.

Solution:

Given decimal numbers using subtraction operation for, 3.4 – 9.7

We are going to subtract the two numbers,

3.4 – 9.7 = -6.3

The difference of given decimal number is -6.3.