Parentheses

Parentheses are made like this ( ).

Parentheses

They show what part we wish to work first in a number sentence. Some people call then brackets.

4 + 3 + 2 = 9

We can think of this as 7 + 2 = 9 or 4 + 5 = 9

If we use parentheses in this way

(4 + 3) + 2 becomes 7 + 2 = 9

4 + (3 + 2) becomes 4 + 5 = 9

Thus, to add we may group these numbers in any order.



Examples using parentheses:

(i) 1 + 4 + 5 = 10

We can think of this as 5 + 5 = 10 or 1 + 9 = 10

If we use parentheses in this way

(1 + 4) + 5 becomes 5 + 5 = 10

1 + (4 + 5) becomes 1 + 9 = 10

Thus, to add we may group these numbers in any order.


(ii) In the number sentence 2 + 1 + 1 + 5 = 9 first make 4s by using parentheses and then add.

Thus, to make 4s we may group these numbers in the order (2 + 1 + 1) + 5 and then add 4 + 5 = 9.


(iii) In the number sentence 2 + 5 + 1 = 8 first make 6s by using parentheses and then add.

Thus, to make 6s we may group these numbers in the order 2 + (5 + 1) and then add 2 + 6 = 8.






2nd Grade Math Practice

From Parentheses to HOME PAGE


New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.



Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



Share this page: What’s this?

Recent Articles

  1. Properties of Multiplication | Multiplicative Identity | Whole Numbers

    Mar 29, 24 09:02 AM

    Properties of Multiplication of Whole Numbers
    There are six properties of multiplication of whole numbers that will help to solve the problems easily. The six properties of multiplication are Closure Property, Commutative Property, Zero Property…

    Read More

  2. Multiplication of a Number by a 3-Digit Number |3-Digit Multiplication

    Mar 28, 24 06:33 PM

    Multiplying by 3-Digit Number
    In multiplication of a number by a 3-digit number are explained here step by step. Consider the following examples on multiplication of a number by a 3-digit number: 1. Find the product of 36 × 137

    Read More

  3. Multiply a Number by a 2-Digit Number | Multiplying 2-Digit by 2-Digit

    Mar 27, 24 05:21 PM

    Multiply 2-Digit Numbers by a 2-Digit Numbers
    How to multiply a number by a 2-digit number? We shall revise here to multiply 2-digit and 3-digit numbers by a 2-digit number (multiplier) as well as learn another procedure for the multiplication of…

    Read More

  4. Multiplication by 1-digit Number | Multiplying 1-Digit by 4-Digit

    Mar 26, 24 04:14 PM

    Multiplication by 1-digit Number
    How to Multiply by a 1-Digit Number We will learn how to multiply any number by a one-digit number. Multiply 2154 and 4. Solution: Step I: Arrange the numbers vertically. Step II: First multiply the d…

    Read More

  5. Multiplying 3-Digit Number by 1-Digit Number | Three-Digit Multiplicat

    Mar 25, 24 05:36 PM

    Multiplying 3-Digit Number by 1-Digit Number
    Here we will learn multiplying 3-digit number by 1-digit number. In two different ways we will learn to multiply a two-digit number by a one-digit number. 1. Multiply 201 by 3 Step I: Arrange the numb…

    Read More