MATH Q1 Lesson 18 Dividing 3 to 4 Digit Numbers by 10,100 or 1000...marvietblanco.pptx

Math division by 10, 100 or 1000

1. Mathematics 4 Quarter 1 Lesson 18 Dividing 3 to 4 Digit Numbers by 10, 100, or 1000 without Remainder Marvie T.Blanco Four-Kindness Urdaneta I Central School Urdaneta City,Pangasinan

2. Drill 81÷9= 48÷6= 72÷9= 64÷8= 125÷5=

3. Review Find the quotient.

4. Motivation Do you help your parents at home? In what ways do you help them? When you see your parent’s faces glow when you helped them, what did you feel?

5. Motivation Kathleen helped her mother repack 200 canned goods to be given to 10 families who were affected by fire in their barangay. How many canned goods will each family receives? What kind of a child is Kathleen? Do you think her mother will be happy to see Kathleen helping her? If you were Kathleen, will you also help your mother, friends, and teachers? Why? What are the given facts? What is asked in the problem? What operation will be used to solve the problem? How will you show the solutio n

6. Performing the Activities Solution 1: The long method Solution 2: The short method 200 ÷ 10 = 20 200 ÷ 10 = 20

7. Processing the Activities How did you find the quotient? Did we have the same quotient in the two methods used Which one is easier to use, the long method or the short one? For the short method: How is the short method done? What pattern is being used? How many zeros are there in the dividend? In the divisor? Which of the two will be your reference when you cancel the number of zeros to make the division easier and faster?

8. Explore and Discover ! A stadium that needs 5000 chairs is being constructed for a city. If the chairs will be arranged in 10 rows, how many chairs are there in a row? If the chairs are to be arranged in 100 rows, how many chairs will there be in a row How about arranging the chairs by 1000 rows that are group by section, how many chairs will there be in a row?

9. Study the solution below. 1) 2) 3) Therefore: 5000 ÷ 10 = 500 5000 ÷ 100 = 50 5000 ÷ 1000 = 5

10. Compare the number of zeros in the dividend and divisor . Then, look at the number of zeros in the quotient. Also compare the dividend and the quotient. What pattern can you find? When dividing a number by 10, 100, or 1000, you can cancel or remove as many zeros in the dividend as there are in the divisor. The remaining digits in the dividend is the quotient.

11. Follow the rule to complete the table. Rule: Divide by 10 Divide by 1000 Divide by 100 Dividend Quotient 650 970 1200 9300 6000 Dividend Quotient 300 100 4300 6900 4000 Dividend Quotient 8000 2000 1000 6000 7000

12. Get Moving ! Complete the spaces with the correct quotient .

13. Keep Moving ! Complete the table

14. Generalization To divide numbers by 10, 100, or 1000 cancel/remove as many zeros in the dividend as there are in the divisor. Then, divide the remaining numbers.

15. Find the missing dividend, divisor, or quotient N ÷ 1 000 = 8 700 ÷ N = 70 400 ÷ 10 = N N ÷ 100 = 39 620 ÷ N = 62

16. Solve each problem. How many pesos are there in 32 000 centavos? How many 200-mL bottles are there in a 43 000-mL can of vinegar? There are 100 cm in a meter. If a road is 742 000 long, how many meters long is it How many meters long is a ribbon that is 2500-cm long? Suppose you had ₱ 1,000,000 in ₱ 100-bills. If you could give away one ₱ 100-bill in a minute, how long would it take you to give away all the money.

17. Apply Your Skills ! Answer each question correctly How many 10s are there in 5520? How many 100s are there in 1100? How many 1000s are there in 39 000? How many 100-peso bills will you need to change a 1000-peso bill? The pencil factory has rush orders from 10 stores. The factory has stock of 55 000 pencils. If the stores will be given equal number of pencils, how many pencils will each store get? Will all the pencils be given Why? If a pair of slippers costs ₱ 100, how many pairs of slippers can one buy with ₱ 800? I want to change my two 1000-peso bills to 25 pieces of 20 peso bills and the rest will be 100-peso bills. How many 100-peso bills will I have? How many 1000-peso bills will make ₱ 1,000,000? How many 100-peso bills will make ₱ 1,000,000? How many 10-peso bills will make ₱ 1,000,000

18. Find the quotient. Assessment

19. REMEDIATION Find the quotient.

20. ENRICHMENT Solve the following problems. The Math Club has 1650 members to be divided into groups of 10. How many groups will there be? Noemi Mae has ₱ 9,600. How many hundred pesos does she have? There are 683 Girl Scouts in the Camp site. They will be divided into groups of 100. how many groups will there be in all? How many more Girl Scouts are needed to form the last group? The pencil factory has rush orders from 10 stores. The factory has stock of 55 000 pencils. If the stores are given equal number of pencils, how many would each store get? Are all the pencils be given out? A blouse cost ₱ 100. How many blouses can one by with ₱ 600