Successfully reported this slideshow.
Upcoming SlideShare
×

Divide

1,015 views

Published on

Bases of division

Published in: Economy & Finance
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Divide

1. 1. DivisionDivision by Oneby One DigitDigit DivisorsDivisorsAllegra JamesAllegra James and Larry Wershbaleand Larry Wershbale Media Design and ProductionMedia Design and Production ISTC 665ISTC 665
2. 2. • Dividing these 16 apples into 4 equal groups, gives you 4 groups that have 4 apples in each of the groups:                 What are you doing whenWhat are you doing when you divide?you divide? • When you divide, you are trying to split something into equally numbered groups • Take these 16 apples:                
3. 3. Division by One-digit DivisorsDivision by One-digit Divisors • Today you will learn how to divide a three-digit dividend by a one-digit divisor, to get a quotient without a remainder • Let’s review these terms
4. 4. What are the parts of aWhat are the parts of a division problem?division problem? • The dividend is the number you are dividing • The divisor is the number you are dividing by • The quotient is the evenly divided result • The remainder is what is left over that cannot be evenly divided
5. 5. When we write the problemWhen we write the problem like this:like this: 136136  5 = 27 r 15 = 27 r 1 136 is the dividend 5 is the divisor 27 is the quotient 1 is the remainder
6. 6. When writing it like this:When writing it like this: 136, the dividend, moves here 5, the divisor, moves to here 27, the quotient, stays here 1 is the remainder1365 27 r 1
7. 7. How do you solve aHow do you solve a division problem?division problem? • Solving a division problem is a step by step process • The method we will learn today is based the words for the people in our families. • They are: Father Mother Sister Brother
8. 8. The “Family” MethodThe “Family” Method Father = Find Mother = Multiply Sister = Subtract Brother = Bring Down
9. 9. FatherFather • Father stands for find • Start by looking at the first number in the dividend • Find the multiple of the divisor that comes closest to that number, without going higher • Use your knowledge of math facts, or a multiplication grid
10. 10. 7113 FFather =ather = findfind the number closet to the first digitthe number closet to the first digit • In the 3’s, the number closest to 7, but not more than 7, is 6 • The other factor is 2 6 • Put a 2 above the 7 2 2
11. 11. MMother =other = multiplymultiply the number that is thethe number that is the factor that you found times the divisorfactor that you found times the divisor • You found 2, multiply it times the divisor, 3 • 2 times 3 equals 6 2 X 3 = 6 • Put a 6 under the 7 7113 2 6
12. 12. SSister =ister = subtractsubtract the number you got bythe number you got by multiplying the divisor,multiplying the divisor, from the number in the dividendfrom the number in the dividend • You got a 6 when you multiplied • Subtract 6 from 7 7113 2 6 • 7 – 6 = 1 – 1 • The difference must be smaller than the divisor!!!The difference must be smaller than the divisor!!!
13. 13. BBrother =rother = bring downbring down the next number,the next number, from the number in the dividendfrom the number in the dividend • Bring down the next number in the dividend • The new number you have is 11 • Now start over again with Father for the ten’s 7113 2 6– 11 1
14. 14. Now, let’s do the second stepNow, let’s do the second step • Father: 9 is the closest multiple, the other factor you found is 3 • Mother: 3 X 3 = 9, put a 9 under the 11 • Sister: subtract 9 from 11 11- 9 = 2 7113 2 6– 11 1 • Brother: bring down the 1 3 9– 21
15. 15. Now, let’s do the last stepNow, let’s do the last step • Father: 21 is the closest multiple, the other factor is 7 • Mother: 7 X 3 = 21, put 21 under the 21 • Sister: subtract 21 from 21 21- 21 = 0 • Brother: nothing’s left, you’re done! 7113 2 6– 11 1 3 9– 21 21– 0 7
16. 16. 8644 2 8– 6 6 Now, let’s practice!Now, let’s practice! • Father • Mother • Sister • Brother 0 2 4 8
17. 17. Now, let’s do the second stepNow, let’s do the second step • Father • Mother • Sister 8644 2 8– 06 6 • Brother 1 4– 24 4
18. 18. Now, let’s do the last stepNow, let’s do the last step • Father • Mother • Sister • Brother 8644 2 8– 06 6 1 4– 24 24– 0 6
19. 19. • Finish the rest of the worksheet • Homework: probs. 1-10, p. 64 in text • Go to this icon on the class’ computers for extra practice if you have free time • Look for the same icon on the class’ website for practice at home What do I do with division now?What do I do with division now?