Mixed Operations | Maths Grade 2 Learning Concepts Orchids International Operations

Mixed operations

We have learned the following operations:

Addition: To find a total or count the objects together we use addition

Subtraction: To find a difference we use subtraction.

Multiplication: To carry out repeated addition of the same number.

Properties of the Addition, Subtraction, and Multiplication

Let’s see some properties of Addition, Subtraction, and Multiplication related to 0 and 1.

1. When we add 1 to any number, we get the next number as a sum.
2. When we add 0 to any number, we get the same number as the sum.

Examples:

1. 45 + 1 = 46
2. 87 + 0 = 87
2. Subtraction:
1. When we subtract 1 from any number, we get the difference as a number that just comes before that number.
2. When we subtract 0 from any number, we get the same number as a difference.

Examples:

1. 88 – 1 = 87
2. 99 – 0 = 99
3. Multiplication:
1. When we multiply any number by 1, we get the same number as a product.
2. When we multiply any number by 0, we get the 0 as a product.

Examples:

1. 56 × 1 = 56
2. 34 × 0 = 0

Fact Family: Addition and subtraction facts. There are some examples in which we use more than one operation.

Word problems:

To solve any word problem, follow the steps-

Step 1: Find out which operation we have to do.

Step 2: Identify the numbers with which we have to do that operation.

Step 3: Find out the answer.

Let’s see that examples:

1. Rohan has 10 pencils. His mother gave him 34 more pencils. Out of total pencils, Rohan gave 12 pencils to Nisha. Now find out how many pencils Rohan has?

Step 1: Find out which operation we have to do.

Here first we have to do addition and then subtraction.

Step 2: Identify the numbers with which we have to do that operation.  Rohan has 44 pencils; in which he gave 12 pencils to Nisha.

Step 3: Find out the answer.

So, let’s do the subtraction. Now Rohan has left 32 pencils.

In the above example, we have done addition and subtraction.

3. Neelu has 4 boxes. In each box, there are 2 balls and 3 dolls. How many toys she has in total?

Step 1: Find out which operation we have to do.

In each box, there are 2 balls and 3 dolls. So, first we have to do an addition.

Step 2: Identify the numbers with which we have to do that operation. Step 3: Find out the answer.

2 balls + 3 dolls = 5 toys in each box. There are total of 4 boxes and each box has 5 toys.

So, let’s do multiplication.

5 toys × 4 boxes = 20 toys

So, Neelu has 20 toys in total.

In the above example, we have done addition and multiplication.

In this way, by using mixed operations we can solve examples easily.  • -