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3 years ago

Explain why estimation is an important skill to know when adding and subtracting decimals.

2 answers:

7 0

I think personally it is way easier for me to do it that way. Let's say we have 6.687-4.798, then think how long it takes to solve this problem versus just solving 6.700-4.800. Does that make sense?

Alla [95]3 years ago

3 0

Estimation is a important skill to know when adding and subtracting decimals because if you estimate you have an idea on what your answer should be close to.

For example 4.68-2.38 could be 5-2 which is 3. 4.68-2.38 equals 2.3. 2.3 is close to 3.

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You have a bag which contains 15 slips of paper that are num- bered 1 through 15. You pull a piece of paper from the bag, do not

BARSIC [14]

Answer:

The correct answer is 1/35 (fully simplified fraction)

Step-by-step explanation:

Number of slips of paper in the bag = 15

Number of slips of paper in the bag that are a multiple of 4 = 3 (those numbered 4, 8 and 12)

Using Laplace Rule, that states that the probability of an event X is obtained by dividing the number of results that form event X by the number of possible outcomes, provided that the elementary events are equiprobable, that is, that all possible outcomes have the same probability.

Probability of pulling a 1st piece of paper multiple of 4 = 3/15 = 1/5

Now we have a second event Y that is not independent from the first event X, because now the number of slips is 14 and not 15, you're not returning the first slip of paper.

Probability of pulling a 2nd piece of paper multiple of 4 = Probability of the 1st event * probability of the 2nd event after it happened the 1st one

Probability of pulling a 2nd piece of paper multiple of 4 = 1/5 * 2/14

Probability of pulling a 2nd piece of paper multiple of 4 = 2/70 = 1/35

The probability of pulling two slips of paper both numbered with a multiple of 4 is 1/35.

3 0

2 years ago

Which of the following is the radical expression of a to the four ninths power ?

lutik1710 [3]

First if a>0 sqrta=a^(1/2), and (a^p)^q=a^pxq

sqrt(a^4/9)= (a^4/9)^1/2=a^4/9x1/2=a^(2/9)
so the answer is a^(2/9)

8 0

3 years ago

Solve the equation 2 3/5 × 1 3/7

Airida [17]

Answer:

26/7

Step-by-step explanation:

$2\frac{3}{5} * 1\frac{3}{7}$ =

$\frac{13}{5}* \frac{10}{3} =$

$\frac{130}{35}$ =

simplify= 26/7

8 0

3 years ago

A. x-6=8-(9+x)

Svetllana [295]

Answer:

Answer A = 5/2

Answer B = 4

Answer C = -3

Answer D = 3

Answer E = 12/5

6 0

3 years ago

Help me out please an thank you

MakcuM [25]

The answer is 46.
Since the sum of the interior angles of a triangle is always 180,
We can find out angle C by subtracting the other two angles
180-102-32=46

3 0

3 years ago