1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Maksim231197 [3]
3 years ago
14

Its says use rounding or compatible numbers to estimate the sum and example 198 + 727 ans is 200+725=925 I still don't understan

d how to do it. Heres a problem 87+34 and here is one 222+203
Mathematics
2 answers:
Ede4ka [16]3 years ago
6 0
Okay, rounding is when you take a number such as 198 and imagine that it is something easier to do math with, like 200. 
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
DENIUS [597]3 years ago
3 0

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:

a+(b+c) = (a +b )+c

Commutative property:

a+b = b+a

198 + 727 \\= 198 + ( 727 + 2)\\=198 + ( 2 + 727)\\=(198 + 2) + 725\\= 200+ 725 \\= 925

a)

87 + 34\\= 87 + ( 31 + 3)\\=87 + ( 3 + 31)\\=(87 + 3) + 31\\=90 + 31\\=121

b)

222 + 203\\=(220 + 2) + 203\\=220 + ( 2 + 203)\\=220 + 205\\=425

You might be interested in
26 is to 74 as 80 is to x x =?
Mila [183]
<span>26 is to 74 and 80 is to X
Since this is a ratio, let’s find the value of X
=> 26 : 74 = 80 : x
=> 74 x 80 = 5 920 / 26
=> 227.7
Let’s check if we have the correct answer.
=> 227.7 * 26
= 5920 / 74 = 80
Or let’s check the other way around
=> 5920 / 80 = 74
Thus our answer is correct</span>



5 0
3 years ago
The assets (in billions of dollars) for a financial firm can be approximated by the function A(x)=318e^0.27x, where x=7 correspo
Mashutka [201]

The value of the asset in 2012, 2014, and 2017 are 8119.72, 13933.55 and, 31321.23, respectively. A function assigns the values.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

Given the assets (in billions of dollars) for a financial firm can be approximated by the function A(x)=318e^{0.27x}, where x=7 corresponds to the year 2007. Therefore, the assets value in the following years will be,

A.) 2012 - A(12)=318e^{0.27\times 12} = 8,119.72

B.) 2014 - A(14)=318e^{0.27\times 14} = 13,933.5

C.) 2012 - A(17)=318e^{0.27\times 17} = 31,321.23

Hence, the value of the asset in 2012, 2014, and 2017 are 8119.72, 13933.55 and, 31321.23, respectively.

Learn more about Function:

brainly.com/question/5245372

#SPJ1

6 0
2 years ago
Plz help I will give Brainlyest plz help fast
Sophie [7]

Answer:

b

Step-by-step explanation:

8 0
2 years ago
One hundred 50 cent coins have a mass of 690g. What is the mass of one 50 cent coin?
olga nikolaevna [1]
You divide 690 by 100 which is 6.9
Therefore, one 50cent coin is 6.9g
7 0
3 years ago
Read 2 more answers
13. Jessica has taken 8 quizzes. The mean of her scores is 92. Her first 6 scores are shown.
Dovator [93]

Answer: Median= 91; 8th quiz score=86

Step-by-step explanation: The sum of the scores is 8×92=736. Subtract the 6 given scores and then a 100 for the seventh quiz to find the score she got on the 8th quiz, this is an 86. Now that you have all the scores, arrange them all in the least to greatest order and find the average of the middle two numbers (median), which is 91!

7 0
2 years ago
Other questions:
  • Nikki is playing a trivia game. At the end of the first round she has 8 points. During the second round she loses 16 points . Wh
    10·2 answers
  • How do you do this???????
    6·1 answer
  • 2= 7+ b/4 in two-step equation-integers
    9·1 answer
  • If a(x) = 3x + 1 and b (x) = StartRoot x minus 4 EndRoot, what is the domain of (b circle a) (x)?
    14·1 answer
  • I need help and fast
    14·2 answers
  • A bag contains 8 purple beads 2 blue beads and 2 pink beads. The probability of randomly drawing a pink beads is 1/6 . What is t
    15·1 answer
  • There is a 85% probability that Jack's dad gives him permission to go to the movies tonight. There is a 60% chance that he will
    9·1 answer
  • 9. The front part of a tent is 8 feet long and 5 feet tall. What is the area of the front part of the tent?
    6·1 answer
  • What times 4 gives me 1/5
    13·2 answers
  • I’m like actually failing
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!