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Hello kids! The concept of place values is perhaps one of the most fundamental and essential concepts that students learn when they are new to mathematics. Only when they know the difference between the place values of a number in the tens place and the one’s place can they say that 100 is greater than 10 and 87 is less than 90. This lesson plan teaches students how to add a two-digit number to another two-digit number. This is done by breaking the numbers into ones, tens, and hundreds.
Contents
Breaking Numbers
The expanded form is a way of writing a number by adding the value of its digits by breaking the number. We can use a place value chart to think about the value of the digits of a number.
Place value is the value of a digit according to its position in the number, such as ones, tens, hundreds, and so on. For example, the place value of 5 in 3458 is 5 tens, or 50. However, the place value of 5 in 5781 is expressed as 5 thousand or 5,000. It is important to understand that a digit can be the same, but its value depends on its position in the number.
Let’s stretch the values
Breaking Numbers
In 12, the place values of the digits are given below:
Breaking Number
In 211, the place values of the digits are given below:
In 2385, the digit place values are given below:
Breaking Numbers
Addition Using Breaking Numbers
Breaking Apart is a mental maths strategy for addition. Some students may find this method more effective than addition from left to right.
In this, we’ll practice adding a two-digit number to a two-digit number by separating the numbers and then adding tens.
For example,
Example 1. We will add 14+12.
We will split the 12 into a 10 and a 2.
Now we add. First, we add 14 + 10 to make 24; then we add the remaining 2 to make 26.
Example
Example 2. 50+12
First, we Split 12 into 10 and 2.
Example
We add 50 + 10 to make 60,
then add the remaining 2 to make 62.
Subtraction Using Breaking Numbers
Example 1. We will Subtract 43 – 17.
We will split the 17 into a 10 and a 7.
Then, we split 7 into 3 and 4.
Then, with the help of a line we subtract.
43 – 10 = 33
33 – 3 = 30
30 – 4 = 26
Example 2.We will Subtract 75 – 18.
We will split the 18 into a 10 and an 8.
Then, we split 8 into 5 and 3.
Then, with the help of a line we subtract.
75 – 10 = 65
65 – 5 = 60
60 – 3 = 57
Example 3. We will Subtract 75 – 12.
We will split the 12 into a 10 and a 2.
Then, with the help of a line we subtract.
75 – 10 = 65
65 – 2 = 63
Solved Examples
1. Breaking numbers:
Ans: After breaking numbers:
2. Adding by Breaking Apart Tens and Ones.
a. Break apart the numbers into tens and ones to add.
Solved Example
Ans: 36
b.
Solved Example
Ans: 57
Practice Questions
Q1. Break the given numbers
Practice Question
Ans: 9 = 4 + 5
5 = 2 + 3
4 = 3 + 1
10 = 6 + 4
6 = 4 + 2
7 = 6 + 1
3 = 2 + 1
Summary
In this article, we learned about place values, its importance and how we use them to make or break numbers. We also learned to separate tens and ones by breaking the tens digit and further using them to solve questions in addition, subtraction etc. For example, 56 = 50 + 6. Along with that, we learned more about it by solving numerous questions to grasp breaking numbers.
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Source: Math Hello Kitty
Categories: Math
