Addition up to 99 with Regrouping | 2nd Grade Maths Term 2 Chapter 2: Numbers

Addition upto 99 with regrouping

2nd Maths : Term 2 Unit 2 : Numbers

Addition upto 99 with regrouping

Recall

Add the following two-digit numbers and verify your answer using abacus.

Examples of two-digit addition with abacus verification

i) 33 + 41 = 74

ii) 52 + 27 = 79

iii) 63 + 24 = 87

iv) 44 + 33 = 77

v) 35 + 23 = 58

vi) 32 + 27 = 59

Travel Through

Blow, Pick and Add

Agaran, Kuralini, Ezhisai and Agilan played, ‘Blow, Pick and Add’ game using tamarind seeds by forming two teams. Each of the players in the teams were given three chances. Players seperate the tamarind seeds from the heap of seeds by blowing and pick only the seperated seeds by counting them. While collecting the seperated seeds if it touches the other seeds then the player looses his chance and the next player get the chance to play.

Children playing a game with tamarind seeds

Number of seeds picked by each of the players is given in the table.

Table showing number of seeds picked by players

The team which collects maximum number of seeds are declared as winner.

Learn

Add using seeds

What is the total number of seeds collected by team A in chance 1? Team A consists of two players Agaran and Kuralini. From the table, in chance 1, the seeds collected by them are 15 and 9. So, let us add 15 and 9 using beads, followed by the procedure for addition.

Take 15 seeds and 9 seeds as shown below.

Separate the seeds into the groups of tens and ones. Seperate 15 seeds as 1 tens and 5 ones. Take 9 seeds as 9 ones.

Step 1: Add ones

We add ones, we get 14 ones.

Step 2: Regroup ones

Regrouping ones we get 1 ten + 4 ones. So, write 4 in ones place and carry over 1 ten in tens place.

Regrouping 14 ones into 1 ten and 4 ones

Step 3: Add tens

The total number of seeds collected by Team A in chance 1 is 24.

Learn

Add using abacus

What is the total number of seeds collected by team B in chance 1? Team B consists of two players Ezhisai and Agilan. They collected 14 and 16 seeds in chance 1. Hence we need to add 14 and 16 using Abacus followed by addition procedure. Put 14 beads in the abacus first and then add 16 beads to it.

Step 1: Add ones

If we add ones, we get 10 ones.

Abacus showing 10 beads in the ones place

Step 2: Regroup the ones

Regrouping ones we get 1 ten and no ones. So, write 0 in ones place and carry over 1 ten in tens place.

Step 3: Add Tens

Altogether, team B collected 30 seeds in chance 1.

Practice

i) Find the team that wins in chance 2.

Team A : 33 + 37 = 70

Team B : 23 + 38 = 61

The team that wins in chance 2 is Team A.

ii) Find the team that wins in chance 3?

Team A : 11 + 13 + 10 = 34

Team B : 12 + 12 + 11 = 35

The team that wins in chance 3 is Team B.

iii) Find the total number of seeds collected by Agaran and Agilan.

Calculations for total seeds collected by Agaran and Agilan

Agaran : 15 + 33 + 29 = 77

Agilan : 16 + 38 + 37 = 91

The total number of seeds collected by Agaran is 77.

The total number of seeds collected by Agilan is 91.

Try This

i) Frame the appropriate question for the number fact given in the table (page number 26) of the ‘Blow, Pick and Add’ game.

1. 33 + 37 = 70

Agaran collected 33 seeds.

Kuralini collected 37 seeds.

Find the total number of seeds collected by both of them.

2. 26 + 37 = 63

Ezhisai collected 26 seeds.

Agilan collected 37 seeds.

Find the total numbers of seeds collected by both of them.

ii) Add the numbers.

Addition practice problems with regrouping

Pleasure Time

Fill in the empty boxes given below.

Mental maths

1. A vegetable seller packs 72 cauliflowers on the first day and 18 cauliflowers on the second day. Find the total number of cauliflowers packed in two days?

Ans :

72 + 18 = 90 cauliflowers

2. Sujitha counts 24 mango trees on one side of the field and Babitha counts 36 mango trees on the other side of the field. What is the total number of mango trees counted?

Ans :

24 + 36 = 60 mango trees

3. An ice cream parlour sells 28 ice creams on Monday and 53 ice creams on tuesday. How many ice creams does it sell in two days?

Ans :

28 + 53 = 81 ice creams

4. The teacher checks 12 note books on a day. She checks 18 more note books on the next day. What is the total number of note books checked by the teacher on the two days?

Ans :