Number Operations (Addition with carrying)


Lesson Planning of Number Operations (Addition of 3-digit numbers with carrying)

Subject Mathematics

Grade II

Students` Learning Outcomes

  • Add 3-digit numbers and ones with carrying of tens and hundreds.

Information for Teachers

  • Question should be written vertically and column headings (units, tens, and hundreds) should be mentioned. Sign of addition + shouldn’t be written under any column heading. There must be space between column headings and numbers to write carry.


  • While teaching the lesson, the teacher should also consult textbook at all steps wherein and whenever it is required.

                                                                           H    T    U

                                                                           4     5    6

                                                                        + 7    4    3     


Material / Resources    

Writing board, chalk/marker, duster, beads, counting frame, clips, paper strips, dices (you can make your own dices using cardboard from empty cartons. Make them bigger than the usual dice, like a 3 x 3 inch dice with numbers written on each side in bold writing)


  • Write an addition problem on the board (3-digit with 2 or 3-digit numbers without carrying) on each strip e.g. Mala got 200 rupees as Eidy from her brother and Rs. 450 Eidy from her father. How much does she have altogether?
  • Ask students to solve assigned questions on their notebooks.




Activity 1

  • Write an addition question (3-digit with 1-digit on writing board (e.g. 145 + 6) and provide a counting frame to students in group.
  • Ask students to represent 145 on counting frame by putting five beads, four beads and one bead in unit, tens and hundred string respectively.


  • Ask them to clip each string and then represent second added by putting six beads in unit string.
  • Ask them to remove clip in unit string, count and when reach at ten remove them from unit string and exchange with one bead at tens string.
  • Write carry under ten`s place on writing board.
  • Count beads in unit string and write beads 1 under the unit on notebooks.
  • Combine beads in tens place, count and write number of beads under the column of tens on writing board.
  • Then count number of beads in the string of hundred and write under the column of hundred on writing board.
  • Give a few more questions of the same level of difficulty level e.g. 196+5. Ask students to repeat step 2 to 8 and find the answer of question.


Activity 2

  • Distribute strips containing an addition question (3-digits with 1-digits numbers) e.g. 167+4, 435+7, 796+7, and 193+8 in groups. (you can also write the questions on the board for each group)
  • Ask students to solve the question in groups.
  • After solving question ask students to share with other groups how did they solve given question.


Activity 3

  • Give three dices to students in group and ask them to roll them.
  • Ask them to use it all three drawn digits to form a three digit biggest possible number.
  • Discuss with them how that can be done: by placing the largest of the 3 numbers on the place value hundred.
  • Ask them to add 9 to their formed number and share sum with other groups.
  • Group having greatest sum will be the winner group.

Sum up / Conclusion

  • Discuss with students what will happen when the sum of two digits becomes more than nine.
  • Demonstrate with material that as soon as a number become more than 9 we replace ten with one in the next column heading and this process continue for next place.


  • Give counting frame to students along with some questions to solve e.g. 445+5, 765+6, 794+9, 699+8, etc.
  • Teacher is also required to involve the students in solving the problems given in the exercise at the end of unit/chapter.

Follow up Tasks

  • Assign some addition questions (3-digits with 1-digits numbers with carry) to solve as homework.
  • Sample Questions:

                                        H   T    U

                                        4    5    6

                                     +            7


                                      H   T    U

                                      9    8   7

                                   +           9


                                   H   T    U

                                   8   9    6

                              +             5



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