Ch7+-+Dividing

﻿ Chapter 7 Dividing

﻿3-22-11 Spiral Review

Dividing Mentally
15/3=5150/3=5 1500/3=500 For each zero at the end of the dividend, you will write a zero(s) at the end of the quoient 1. 36,000/6=6,000 2. 1,000/5=200 3. 300/6=50 4. 81,000/9=9,000 How about if the zeros are not in the dividend 240/6=40

﻿Estimating Quotients
8/315 estimate 8/320=40 <span style="font-family: Arial,Helvetica,sans-serif;">We increased the dividend so this is an overestimate

<span style="font-family: 'Arial Black',Gadget,sans-serif;">Diving With Remainders
14/3 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ _4_R2 4x3=12+2=14 3 l 14 -__12__

2
The remainder must be __less__ than the divisor. The part that is left over when you divide something into equal parts, it is called the __remainder__.

<span style="font-family: 'Arial Black',Gadget,sans-serif;">Two Digit Quotients(Long Division) <span style="font-family: Arial,Helvetica,sans-serif;">1. estimate <span style="font-family: Arial,Helvetica,sans-serif;">2. divide <span style="font-family: Arial,Helvetica,sans-serif;">3. multiply <span style="font-family: Arial,Helvetica,sans-serif;">4. subtract <span style="font-family: Arial,Helvetica,sans-serif;">5. compare <span style="font-family: Arial,Helvetica,sans-serif;">6. bring down <span style="font-family: Arial,Helvetica,sans-serif;">7. repeat <span style="font-family: Arial,Helvetica,sans-serif;">8. check

__15R1__ 3 I 46 - __3__ ↓ 16 -__15__ 1

7 I 869
- __7__↓ l 16 l -__14__ ↓ 29 -__28__ 1

Check 124 __x7__ 868 __+ 1__ 869

<span style="font-family: 'Arial Black',Gadget,sans-serif;">Intrepting Remainders
__<span style="font-family: Arial,Helvetica,sans-serif;">14R2 __ <span style="font-family: Arial,Helvetica,sans-serif;">﻿ 4I58 __-4__↓ 18 __-16__ 2 Check 14 __x4__ 56 __+2__ 58

<span style="font-family: 'Arial Black',Gadget,sans-serif;">Zeros in Quotient
__<span style="font-family: Arial,Helvetica,sans-serif;">108R3﻿ __ <span style="font-family: Arial,Helvetica,sans-serif;">4 I 435 __<span style="font-family: Arial,Helvetica,sans-serif;">- 4 __ <span style="font-family: 'Arial Black',Gadget,sans-serif;">↓ <span style="font-family: Arial,Helvetica,sans-serif;"><span style="font-family: Arial,Helvetica,sans-serif;">﻿ ﻿ 03 -__00__ 35 -__32__ 3

<span style="font-family: 'Arial Black',Gadget,sans-serif;">Dividing Money Amounts
<span style="font-family: Arial,Helvetica,sans-serif;">8 pack H20 $2.48

1. estimate
__$. 31__

8 I $2.48
2. Divide as if there is no decimal of the $ sign 3. Multiply 4. Subtract 5. Compare 6. Bring Down

//**IN NOTEBOOK**//
 * Fractions, Lengh, and the Number Line**

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 * <___I___IIII_I >**

Fractions in Simplest Form (in __lowest terms__) A fraction is in __simplest form__ when, or if the numerator and the denomenator have no common factors. same #s when you multiply ex. 8/12 greatest common factor 8- 1, 2, 4, 8 12-1, 2, 3, 4 * 4 is the greatest common factor. *