3 years ago

IN YOUR OWN WORDS How do you use mental math to multiply two

1 answer:

6 0

Answer:

. We at themathlab.com highly recommend this book if you really want to become a mental math whiz. "To multiply two 2-digit numbers without showing work, first multiply the ones digits together, then 'cross-multiply,' and finally multiply the tens digits together.

Step-by-step explanation:

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What is 32+56•45? Please answer!

otez555 [7]

32+56*45

Remember PEMDAS, so we have to solve the multiplication part of the expression first....

32+2520

Now we solve for the addition

2552

Answer=2552

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4 years ago

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Mom wants to make 5 lbs of the sugar syrup. How much water and how much sugar does he need to make 20% syrup?

Wittaler [7]

Answer:

Let x pound of the sugar to make 20% syrup.

As per the statement:

Mom wants to make 5 Ibs of the sugar syrup.

We have to find how much water and sugar does she need to make 20% syrup.

By definition of proportion; we have

$\frac{x}{5} = \frac{20}{100}$

Simplify:

$\frac{x}{5} = \frac{1}{5}$

Multiply both sides by 5 we get;

$x = 1$

Remaining = 5 -1 = 4 pounds of water

Therefore, 1 pounds of sugar and 4 pounds of water does she need to make 20% syrup.

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3 years ago

Multiply by using suitable rearrangement: 2 × 4 × 8 × 50 × 125. I need this answer. Quick. Ok, How about I give 15 points? Yeah

nlexa [21]

Answer:

$2 \times 4 \times 8 \times 50 \times 125 \\ \\ = 400000$

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3 years ago

Faelyn noticed that she does not have a common factor. Which accurately describes what Faelyn should do next?

Jlenok [28]

Without knowing what Faelyn has done so far or what she is working with, the second selection seems appropriate.

6x^4 -5x^2 -4
= (6x^4 +3x^2) -(8x^2 +4)
= 3x^2*(2x^2 +1) -4(2x^2 +1)
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4 0

4 years ago

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Mr rivers bought a can of paint. He used 3 / 8 of it to paint a shelf. He used 1/4 to paint a wagon. He used some to paint a bir

allsm [11]

3/8 + 2/8 = 5/8

8/8 - 1/8 = 7/8

7/8 - 5/8 = 2/8 = 1/4

he used 1/4 to paint the bird house.

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4 years ago

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