Subtract within 100

Subtract within 100

2.3

Substract within 100

Keyword for subtraction operation (-)

Find the difference
Find the subtraction
...what is left
Find the balance

There are various methods to solve suitable addition operations for numbers up to 100

The method count back steps
Using common forms

Examples of questions and solutions to subtraction operations
Siti has 6 marbles. Siti gave Amir 2 marbles. How many marbles does Siti have left? Mathematical sentences: \(6 -2= 4\)
Count back steps	Count back 2 steps from 6: 6, 5, 4 The remaining number of marbles that Siti has left is 4.
Using long method	We solve this subtraction problem by subtracting the number that is, which we will get. Then, if there are numbers on the left, continue subtractiong as before. We write the answer as below. \(\begin {array}{rr} \space\space6\\-\quad\space\space2\\\hline \space\space4 \\\hline \end {array}\)