LESSON PLANNING FOR ADDITION OF TWO DIGITS NUMBERS WITH CARRY

Subject Mathematics

Grade 2^{nd}

Students` Learning Outcomes

- Add 2-digit numbers with carry.
- Solve real life problems, involving addition of 2-digit numbers, with carrying.

Information for Teachers

- Adding 2-digit numbers is just like adding 1-digit numbers first add units then tens.

- To add 2-digit numbers addition process goes more than once.

- Question should be written vertically in column headings from left to right.

- Units, tens and hundreds should be mentioned along with writing any question.

- Sign of addition + should n`t be written under any column heading.

- While teaching the lesson, the teacher should also consult with textbook where and when applicable.

Material / Resources

Writing board, marker / chalk, duster, sticks, counting frame and beads of two colours, paper strips, textbook

Introduction

- Ask the students; if your father gives you Rs. 5 and then your mother also gives you Rs. 5. How much money will you have?
- Ask some more questions where addition of one digit numbers is required.
- Encourage them to count on their fingers.

- Ask them; if you have Rs. 27 and you get Rs. 52 more, can you count on your fingers to add the numbers?
- Note their responses on the board.

Development

Activity 1

- Ask students to sit in the groups and tell the story.
- Sara made 2 necklaces with beads.
- One necklace has 36 beads and the second necklace has 25 beads. How many beads did she use in all?

- Ask students in groups to use match sticks to represent beads, then as them to add loose sticks in loose sticks.
- Remind them that ten loose sticks will be tied up to make a bundle.
- Count remaining loose sticks and write under the units and hundreds.
- Now combine bundles together write under the heading of tens.

- Give more questions to the students to solve like, 75 + 17, 67, + 25 etc.

Activity 2

- Students will remain in groups.

Give an addition question (2-digit into 2-digit) along with a counting frame to students in group e.g. 92 + 68.

Ask students to represent 92 on counting frame by putting 2 beads in unit string and 9 beads in tens.

- Ask them to clip each string.
- Represent 68 on counting frame by putting 8 beads in the unit`s string and 6 beads in tens.
- Count the beads in the unit string and write in notebook.
- Combine beads in ten`s string and count them.

- As soon as they reach ten, replace ten beads with one bead at hundred`s place, count the remaining beads and write in the notebook.
- Similarly count the beads in hundred places and write in notebook.
- Now write the sum vertically and solve with carrying.

Activity 3

- Give a paper strip to the students in groups containing a word problem related to addition of 2-digit with 2-digit numbers e.g. Ali and Fatima went to a festival. Ali bought 12 candies and Fatima bought 20 candies. How many candies did they buy altogether?
- Solve the question on the paper.

- Ask one student from each group to present the question assigned to them and how they solved it?

Activity 4

- Ask the students to solve the problems given in their textbook.
- Observe their work and guide them where necessary.
- Assign some questions to the students as homework from textbook.

Sum up / Conclusion

- Discuss that:
- When we add 2 digit numbers we first add the units and then the tens.
- If units are more than nine we carry the ten to the tens column.

- Similarly tens are more than 10 we carry 10 (tens) to hundred column as one hundred.

Assessment

- Give some questions (addition with carrying) to solve e.g. 45 + 58, 65 + 76, 74 + 96 etc.

- Write 2-digits number on paper strips. Ask students to pick any two strips randomly and find the sum of both numbers.
- Give simple word problems of daily life to solve.

Follow up

- Assign some addition questions to solve as homework E.g.
- There are fifty-one trees in the park. Twenty-six more trees will be planted this year. How many trees will be there in all?

- Count the match sticks of two match boxes, add them and write on their notebooks.

- For a feast mother made roti’s and nans, at home, if each guest eat 1 nans in breakfast and 2 roties, and 1 nans in lunch then how many reties and nans are needed for 10 guests?

- Ask the students to solve the questions given in their textbook.