How many Times? Word Problems-Introduction Madhavi Ranade PRT.

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Presentation transcript:

How many Times? Word Problems-Introduction Madhavi Ranade PRT

Situation A: There are 7 people in each house and there are 10 houses in a colony. How many people altogether live in that colony? Situation B: There are 7 people in one house and 10 people in other house. How many people live altogether in the two houses? What is the difference between the two situations?

7 people Situation A is shown as 7 people Situation B is shown as 7 people10 people

Situation A can be viewed as many equal groups making a big group whereas Situation B has unequal groups combined together. Lets recall Word Problem in Situation B can be solved as Number of people in house 1 (7 ) Number of people in house 2 (10) Number of people living in both houses ( ) = 17 people

Number of things in Group 1 Number of things in Group 2 Total Number of Things altogether It there are more than two groups, Number of things in Group 3 Situation A has 7 people +7 people+7people+7people+7people+7 people +7 people+ 7 people +7 people+ 7 people= 70 people REPEATED ADDITION of a same number can be called as multiplication 7 people is repeated 10 times so Total number of people in the colony are 10 times 7 Or 10 x 7 = 70 people.

Identify the arithmatic operation needed to solve the following problems Problem 1: Thirty children play tennis in the school tennis court. Every body has 6 balls. How many balls in all they have ? Addition Subtraction Multiplication

Missed it! Try Again. Read the question carefully. Analyze the problem and match it with various situations learnt in the beginning.

Got it! Now try another.

Problem 2: Rajni has 30 apples. Shalu has 17 apples. How many apples in all ? Addition Addition Subtraction Multiplication

Missed it! Try Again. Read the question carefully. Analyze the problem and match it with various situations learnt in the beginning.

Got it! Now try another.

Problem 3: The students of class III decided to go for a picnic. 48 students gave their names for going to a picnic. On picnic day 16 students more came to join them. How many students went to the picnic? Addition Subtraction Multiplication

Missed it! Try Again. Read the question carefully. Analyze the problem and match it with various situations learnt in the beginning.

Got it! Now try another.

Problem 4: My mother has 58 stickers. She gave 27 stickers to me and remaining to my brother. How many stickers will my brother get? Addition Subtraction Multiplication

Missed it! Try Again. Read the question carefully. Analyze the problem and match it with various situations learnt in the beginning.

Got it! Now try another. Well Done !