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 Page 1


 
                                      
 
 
 
 
 
Q.1) Find the sum of the following. 
a.) 18 + 15 = ___ 
b.) 29 + 15 = ___ 
c.) 63 + 81 = ___ 
 
Q.2) Solve the following.  
a.          26                                
+   28 
______                                    
            ______ 
   b.            39 
+   34 
       ______ 
           ______ 
 
Q.3) State true or false.  
a.) 45 - 44 = 20 
b.) 75 - 57 = 132 
 
Q.4) Solve the following with the help of the number line.  
 
a. 100 - 12 =? 
b. 99 - 13 =? 
 
 
 
 
 
 
 
 
 
 
  
 
 
  
 
Page 2


 
                                      
 
 
 
 
 
Q.1) Find the sum of the following. 
a.) 18 + 15 = ___ 
b.) 29 + 15 = ___ 
c.) 63 + 81 = ___ 
 
Q.2) Solve the following.  
a.          26                                
+   28 
______                                    
            ______ 
   b.            39 
+   34 
       ______ 
           ______ 
 
Q.3) State true or false.  
a.) 45 - 44 = 20 
b.) 75 - 57 = 132 
 
Q.4) Solve the following with the help of the number line.  
 
a. 100 - 12 =? 
b. 99 - 13 =? 
 
 
 
 
 
 
 
 
 
 
  
 
 
  
 
 
                                      
 
Q.5) Solve the sums.  
a.)  48 
    × 14 
----------  
---------- 
 
b.) 44 
   - 16 
------- 
------- 
 
Q.6) The teacher told 13 girls and 19 boys to go to the park to 
play. How many students went to the park?  
 
  
Q.7) Solve.  
a. 13 
     × 37 
          ____ 
      ____ 
  
    b.       19 
      +     55 
      ______ 
      ______ 
 
Q.8) Sam has 68 coins in his piggy bank and 34 in his jar. How 
many coins does he have in all?   
 
 
 
 
 
 
Page 3


 
                                      
 
 
 
 
 
Q.1) Find the sum of the following. 
a.) 18 + 15 = ___ 
b.) 29 + 15 = ___ 
c.) 63 + 81 = ___ 
 
Q.2) Solve the following.  
a.          26                                
+   28 
______                                    
            ______ 
   b.            39 
+   34 
       ______ 
           ______ 
 
Q.3) State true or false.  
a.) 45 - 44 = 20 
b.) 75 - 57 = 132 
 
Q.4) Solve the following with the help of the number line.  
 
a. 100 - 12 =? 
b. 99 - 13 =? 
 
 
 
 
 
 
 
 
 
 
  
 
 
  
 
 
                                      
 
Q.5) Solve the sums.  
a.)  48 
    × 14 
----------  
---------- 
 
b.) 44 
   - 16 
------- 
------- 
 
Q.6) The teacher told 13 girls and 19 boys to go to the park to 
play. How many students went to the park?  
 
  
Q.7) Solve.  
a. 13 
     × 37 
          ____ 
      ____ 
  
    b.       19 
      +     55 
      ______ 
      ______ 
 
Q.8) Sam has 68 coins in his piggy bank and 34 in his jar. How 
many coins does he have in all?   
 
 
 
 
 
 
 
                                      
 
 
Q.9) Add the money and write the total amount in dollars. 
a.) $12 + $91 = ___ 
b.) $17 + $62 = ___ 
 
Q.10) Match the following. 
a.) 9 x 21 i.) 234 
b.) 9 x 22 ii.) 189 
c.) 9 x 26 iii.) 198 
 
   
 
 
 
 
 
  
Page 4


 
                                      
 
 
 
 
 
Q.1) Find the sum of the following. 
a.) 18 + 15 = ___ 
b.) 29 + 15 = ___ 
c.) 63 + 81 = ___ 
 
Q.2) Solve the following.  
a.          26                                
+   28 
______                                    
            ______ 
   b.            39 
+   34 
       ______ 
           ______ 
 
Q.3) State true or false.  
a.) 45 - 44 = 20 
b.) 75 - 57 = 132 
 
Q.4) Solve the following with the help of the number line.  
 
a. 100 - 12 =? 
b. 99 - 13 =? 
 
 
 
 
 
 
 
 
 
 
  
 
 
  
 
 
                                      
 
Q.5) Solve the sums.  
a.)  48 
    × 14 
----------  
---------- 
 
b.) 44 
   - 16 
------- 
------- 
 
Q.6) The teacher told 13 girls and 19 boys to go to the park to 
play. How many students went to the park?  
 
  
Q.7) Solve.  
a. 13 
     × 37 
          ____ 
      ____ 
  
    b.       19 
      +     55 
      ______ 
      ______ 
 
Q.8) Sam has 68 coins in his piggy bank and 34 in his jar. How 
many coins does he have in all?   
 
 
 
 
 
 
 
                                      
 
 
Q.9) Add the money and write the total amount in dollars. 
a.) $12 + $91 = ___ 
b.) $17 + $62 = ___ 
 
Q.10) Match the following. 
a.) 9 x 21 i.) 234 
b.) 9 x 22 ii.) 189 
c.) 9 x 26 iii.) 198 
 
   
 
 
 
 
 
  
 
                                      
 
 
 
 
 
 
Q.1) a.) 33    
b.) 44 
c.) 144 
Q.2) a.) 54   
b.) 73 
Q.3) a.) False 
b.) False 
Q.4) a.) 88 
b.) 86 
Q.5) a.) 672 
b.) 28 
Q.6) 32 students 
Q.7) a.) 481 
b.) 74 
Q.8) 102 coins 
Q.9) a.) $103 
b.) $79 
Q.10) a-ii  
b-iii 
c-i 
 
 
 
 
 
 
  
Page 5


 
                                      
 
 
 
 
 
Q.1) Find the sum of the following. 
a.) 18 + 15 = ___ 
b.) 29 + 15 = ___ 
c.) 63 + 81 = ___ 
 
Q.2) Solve the following.  
a.          26                                
+   28 
______                                    
            ______ 
   b.            39 
+   34 
       ______ 
           ______ 
 
Q.3) State true or false.  
a.) 45 - 44 = 20 
b.) 75 - 57 = 132 
 
Q.4) Solve the following with the help of the number line.  
 
a. 100 - 12 =? 
b. 99 - 13 =? 
 
 
 
 
 
 
 
 
 
 
  
 
 
  
 
 
                                      
 
Q.5) Solve the sums.  
a.)  48 
    × 14 
----------  
---------- 
 
b.) 44 
   - 16 
------- 
------- 
 
Q.6) The teacher told 13 girls and 19 boys to go to the park to 
play. How many students went to the park?  
 
  
Q.7) Solve.  
a. 13 
     × 37 
          ____ 
      ____ 
  
    b.       19 
      +     55 
      ______ 
      ______ 
 
Q.8) Sam has 68 coins in his piggy bank and 34 in his jar. How 
many coins does he have in all?   
 
 
 
 
 
 
 
                                      
 
 
Q.9) Add the money and write the total amount in dollars. 
a.) $12 + $91 = ___ 
b.) $17 + $62 = ___ 
 
Q.10) Match the following. 
a.) 9 x 21 i.) 234 
b.) 9 x 22 ii.) 189 
c.) 9 x 26 iii.) 198 
 
   
 
 
 
 
 
  
 
                                      
 
 
 
 
 
 
Q.1) a.) 33    
b.) 44 
c.) 144 
Q.2) a.) 54   
b.) 73 
Q.3) a.) False 
b.) False 
Q.4) a.) 88 
b.) 86 
Q.5) a.) 672 
b.) 28 
Q.6) 32 students 
Q.7) a.) 481 
b.) 74 
Q.8) 102 coins 
Q.9) a.) $103 
b.) $79 
Q.10) a-ii  
b-iii 
c-i 
 
 
 
 
 
 
  
 
                                      
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1. Do you know what carry over means? It is a 
digit that is transferred from one column of 
digits to another column. For example, when 
6 and 7 are added to make 13, the "3" is 
written in the same column and the "1" is 
carried to the column to the left.  
2. When do you need to carry over? When the 
sum of a column is greater than 9, we need to 
bring (carry over) the second number to the 
next column to the left. 
3. Multiplication of 2 digit number by a 2 digit 
requires addition in the second step. 
 
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FAQs on Double Digit Worksheet - Mental Maths - Class 1

1. What is a double digit?
A double digit is a number that consists of two digits, ranging from 10 to 99. It is any number between 10 and 99, inclusive.
2. How many double-digit numbers are there?
There are a total of 90 double-digit numbers. This is because there are 9 possible options for the tens digit (1-9) and 10 possible options for the units digit (0-9), resulting in 9 x 10 = 90 double-digit numbers.
3. Can a double-digit number be negative?
No, a double-digit number cannot be negative. The term "double digit" refers to positive numbers only. If a number has a negative sign in front of it, it is considered a negative number.
4. How do you determine the place value of each digit in a double-digit number?
In a double-digit number, the leftmost digit represents the tens place value and the rightmost digit represents the units place value. For example, in the number 25, the digit 2 represents the tens place value (20) and the digit 5 represents the units place value (5).
5. What is the largest double-digit number?
The largest double-digit number is 99. It consists of the digit 9 in both the tens and units place values, making it the highest possible value for a two-digit number.
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