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3 years ago

How do you estimate a whole number

2 answers:

8 0

You round it up by changing the number to the nearest ten, hundred, thousand so on. Round the numbers first the use math to help estimate your answer. If the number is 5 or less so 12345 round down and if it's 6789 or 10 round up like 453=450 28=30

stepladder [879]3 years ago

8 0

Answer:

Like if you have 25 and it tells you to round the whole number to the nearest tens place then you would look at the number on the right if it is bigger than you add 1 to the number on the left and turn the 5 in to a 0 so you would come up with 30.

Step-by-step explanation: Like if you have 25 and it tells you to round the whole number to the nearest tens place then you would look at the number on the right if it is bigger than you add 1 to the number on the left and turn the 5 in to a 0 so you would come up with 30.

You might be interested in

152/600, 104/600,136/600,208/600 as decimals

zaharov [31]

152/600=0.25

104/600=0.17

136/600=0.23

208/600=0.35

5 0

3 years ago

Solve the inequality x + 2 1/2 > -1/2. Graph the solution set on a number line.show your work.

antiseptic1488 [7]

Answer:

x > - 3

Step-by-step explanation:

x + 2 $\frac{1}{2}$ > - $\frac{1}{2}$ First turn 2 $\frac{1}{2}$ into an fraction since its easier. So it becomes $\frac{5}{2}$

x + $\frac{5}{2}$ > - $\frac{1}{2}$

- $\frac{5}{2}$ - $\frac{5}{2}$ Do inverse operations, so subtract $\frac{5}{2}$ from both sides.

x > - $\frac{6}{2}$ Combine - $\frac{5}{2}$ with - $\frac{1}{2}$ , which gives us - $\frac{6}{2}$

x > - 3 Since we know that 6 divided by 2 is 3.

This would not allow me to attach an image so I am going to type a visual representation f what the graph would look like below)

<-------------O--------------------------------------------------->

-5 -4 -3 -2 -1 0 1 2 3 4 5

So, the number line would be a solid line rather than dashed (but I was not able to attach an image so I kind of had to improvise). When using ≥ ≤ sings the circle of the point is closed. When using < and > signs, the circle of the point is open. Thus, in this scenario since he sign is >, then the circle of the point is open. The direction of the arrow and ray for this equality is going to the right because the answer is that x is greater than - 3, Therefore any values greater than - 3 are a possibility which is why the arrow goes on indefinitely.

4 0

3 years ago

One number is 18 more than another number. The sum of the numbers is 36. find the numbers

tatuchka [14]

We can use a system of equations in order to solve for both of the numbers. Let's start off by assigning variables to each number. The bigger number can be 'x', and the smaller number can be 'y'.

We can make two equations from the given:

x = 18 + y

("One number is 18 more than another number")

x + y = 36

("The sum of the numbers is 36")

If you look at the first equation, the variable 'x' already has a value (18 + y). We can input its value into the second equation in order to solve for y:

x + y = 36

(18 + y) + y = 36

18 + 2y = 36

2y = 18

y = 9

Input the value of 'y' into the first equation:

x = 18 + y

x = 18 + 9

x = 27

One number is 27 and the other number number is 9.

Let me know if you'd like me to explain anything I did here.

- breezyツ