Its says use rounding or compatible numbers to estimate the sum and example 198 + 727 ans is 200+725=925 I still don't understand how to do it. Heres a problem 87+34 and here is one 222+203
Answers
Answer:
a) 121
b) 425
Step-by-step explanation:
We are given the following information in the question:
198 + 727 + 200 + 725 = 925
This can be explained with the help of associative of addition and subtraction and commutative property of the addition.
Associative property:
Commutative property:
a)
b)
200 is easier to add with because there are zeroes in the tens place and the ones place.
725 is easier to add with than 727 because the ones place digit, (5), is an easier base to use, just like zero.
Using the easier numbers, 200 + 725 = 925
Using the original numbers, 198 + 727 + 925
*Because you took two pieces from the 727 and added them to 198, the four numbers in this problem are compatible.
Compatible numbers are when you use numbers that are close to the original ones and make it easier to do the problem in your head.
____
In the case of 87+ 34, the simplest numbers to use would be 90 instead of 87 and 35 instead of 34. Not as easy as the first equation, but still doable.
90+35+125
or
87+34=121
____
In the case of 222+203, the simplest substitutions are 220 and 200.
220+200=420
or
222+203=425
Hope this helps,
Ahawk
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Answers
Answer:
Step-by-step explanation:
How do you find the midpoint of A and B?
To calculate it:
Add both "x" coordinates, divide by 2.
Add both "y" coordinates, divide by 2.
Final answer:
The coordinates of the midpoint of the line segment with endpoints A(4, 2) and B(1, -2) are found by averaging the corresponding x- and y-coordinates of the endpoints. This yields a midpoint of (2.5, 0)
Explanation:
The coordinates of the midpoint of the line segment with endpoints A(4, 2) and B(1, -2) can be determined by the midpoint formula. The midpoint formula states that the x-coordinate of the midpoint is the average of the x-coordinates of the two endpoints, and the y-coordinate of the midpoint is the average of the y-coordinates of the two endpoints.
Therefore, the x-coordinate of the midpoint is:
(x1 + x2) / 2 = (4 + 1) / 2 = 2.5
and the y-coordinate of the midpoint is:
(y1 + y2) / 2 = (2 + -2) / 2 = 0
Hence, the coordinates of the midpoint of AB are (2.5, 0).
Learn more about Midpoint Formula here:
#SPJ11
Find the slope of the line
Answers
So:
the line drops one unit.
Its slope is -1.
Answers
Based on this random sample, approximately how many bottles will the factory reject from the day's production?
A.4
B.20
C.60
D.80
Answers
Answer:
option: D is correct.
Step-by-step explanation:
The random sample is given of 50 bottles which is depicted as:
1 bottle under weight
46 bottles correct weight
3 bottles over weight
As the bottles which are under weight and over weight are rejected.
that means out of 50: 4 bottles are rejected.
Now we have to find out the number of bottles rejected out of the 1000 bottles.
As 1000 is 20 times of 50.
Hence the number of bottles rejected will also get multiplied by 20.
Hence total number of bottles rejected=80.
Hence, option D is correct.
Answers
Answer:
12/325
Step-by-step explanation:
Purple marble: 8/26 = 4/13
Blue marble after: 3/25
3/25*4/13 = 12/325
A.3.6
B. 11.1
C.11.2
D.3.7
Answers
Answer:
C.11.2
Step-by-step explanation:
The distance between 2 points is given by
d = sqrt( (x2-x1)^2 + (y2-y1)^2)
= sqrt( ( -2-0)^2 + (-7-4)^2)
= sqrt( (-2)^2 + (-11)^2)
= sqrt( 4 + 121)
= sqrt(125)
= 11.18033989
To the nearest tenth
11.2