write the fact family for 2,11,and 9
______________?
______________?
_______________?
________________?
I don,t understand of rule -.25
in $1.25 out $1.oo
in $0.30 out $0.05
in $___ ? out $0.75
in 2.40 out _____? please help me!!
Fact family:
2 + 9 = 11
9 + 2 = 11
11 - 2 = 9
11 - 9 = 2
http://www.bellaonline.com/articles/art57615.asp
To write the fact family for the numbers 2, 11, and 9, you need to understand what a fact family is. A fact family consists of three numbers that are related to each other through addition and subtraction.
To find the fact family for 2, 11, and 9, you can start by writing down the three numbers:
2, 11, 9
To determine the addition and subtraction relationships, you can start with addition.
First, add 2 and 9:
2 + 9 = 11
Next, add 11 and 9:
11 + 9 = 20
Now, you can see that the first two numbers added together equal the third number. To complete the fact family, you need to find the subtraction relationships by subtracting the numbers.
Subtract 9 from 11:
11 - 9 = 2
Subtract 9 from 20:
20 - 9 = 11
Now, you have the complete fact family:
2 + 9 = 11
11 + 9 = 20
11 - 9 = 2
20 - 9 = 11
Each equation in the fact family shows a relationship between these three numbers through addition and subtraction.
As for the second part of your question about the rule -.25, I'm not sure what you are referring to. Could you please provide more context or clarification?
Regarding the second set of calculations, let's solve them step by step:
For the given scenario:
in $1.25 out $1.00
To determine the missing value, we need to understand the relationship between the inputs and outputs. From the given information, we can observe that the value out is always $0.25 less than the value in.
So, for the first set:
in $1.25 out $1.00
$1.25 - $0.25 = $1.00
This confirms that there is a $0.25 reduction when going from in to out.
Now, let's apply the same logic to the second set:
in $0.30 out $0.05
$0.30 - $0.25 = $0.05
Here, we subtract $0.25 from the input value to get the output value.
To determine the missing value in the third set:
in $___ ? out $0.75
We can apply the same deduction:
$___ - $0.25 = $0.75
To solve this equation, we need to find the value that, when reduced by $0.25, equals $0.75.
To isolate the variable, we can add $0.25 to both sides of the equation:
$___ - $0.25 + $0.25 = $0.75 + $0.25
$___ = $1.00
Therefore, the missing input value is $1.00.
Finally, for the fourth set:
in $2.40 out _____ ?
Applying the same logic, we can find the missing value by subtracting $0.25 from the input value:
$2.40 - $0.25 = $_____
$2.15 - $0.25 = $1.90
So, the missing output value is $1.90.
I hope this helps clarify how to find the fact family and solve the given calculations. If you have any further questions, feel free to ask!