정수와 유리수

Javier’s portfolio gained $3,600.

Answers will vary.

$81$

$17$

$5,394$

• ⓐ We read this as sixty-four divided by eight and the result is the quotient of sixty-four and eight.
• ⓑ We read this as forty-two divided by seven and the result is the quotient of forty-two and seven.
• ⓒ We read this as twenty-eight divided by four and the result is the quotient of twenty-eight and four.

• ⓐ eighty-four divided by seven; the quotient of eighty-four and seven
• ⓑ eighteen divided by six; the quotient of eighteen and six.
• ⓒ twenty-four divided by eight; the quotient of twenty-four and eight

• ⓐ seventy-two divided by nine; the quotient of seventy-two and nine
• ⓑ twenty-one divided by three; the quotient of twenty-one and three
• ⓒ fifty-four divided by six; the quotient of fifty-four and six

To find the quotient $24\div 8,$ we want to know how many groups of $8$ are in $24.$

Model the dividend. Start with $24$ counters.

The divisor tell us the number of counters we want in each group. Form groups of $8$ counters.

Count the number of groups. There are $3$ groups.

$24\div 8=3$

• ⓐ
  	$42\div 6$
  Divide 42 by 6.	$7$
  Check by multiplying. $7\cdot 6$
  $42\checkmark$

• ⓑ
  	$\frac{72}{9}$
  Divide 72 by 9.	$8$
  Check by multiplying. $8\cdot 9$
  $72\checkmark$

• ⓒ
  	$763$
  Divide 63 by 7.	$9$
  Check by multiplying. $9\cdot 7$
  $63\checkmark$

ⓐ 9 ⓑ 3

ⓐ 4 ⓑ 5

• ⓐ
  	$11\div 11$
  A number divided by itself is 1.	$1$
  Check by multiplying. $1\cdot 11$
  $11\checkmark$

• ⓑ
  	$\frac{19}{1}$
  A number divided by 1 equals itself.	$19$
  Check by multiplying. $19\cdot 1$
  $19\checkmark$

• ⓒ
  	$17$
  A number divided by 1 equals itself.	$7$
  Check by multiplying. $7\cdot 1$
  $7\checkmark$

• ⓐ 1
• ⓑ 27

• ⓐ 16
• ⓑ 4

• ⓐ
  	$0\div 3$
  Zero divided by any number is zero.	$0$
  Check by multiplying. $0\cdot 3$
  $0\checkmark$

• ⓑ
  	$10/0$
  Division by zero is undefined.	undefined