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ss7ja [257]
3 years ago
6

Which method do you prefer to use to find sums__count by tens and ones,use compatible numbers,or use friendly numbers and adjust

? Explain why.
Mathematics
1 answer:
DiKsa [7]3 years ago
5 0
I count by tens and ones. Let me show you why with an example;

X=56+27

What is x?

To solve this equation, all you have to do is add 56 and 27. Easy. Since there are 7 tens, (5 plus 2), 7 will be in the tenths place. Like this: 7_. What will be next to it? To find this, just add the ones. 6+7=13. “Uh. Oh, 13 is bigger than ten,) you might be wondering. This problem has a simple fix. How many tens are in 13? One. You add ten to your 7, and you now have 8 in your tens place. Add the remaining three ones, and you’ve got your answer. 83.

56+27=83

X=83.

This method is easier and faster than any other method. Did you know calculators are actually programmed to use this method for simple addition? Who would’ve thought?


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7 0
3 years ago
Show that in any group of 101 people there are at least two persons having the same number friends (It is assumed that if a pers
vladimir1956 [14]

Answer:

Step-by-step explanation:

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7 0
4 years ago
Picture is not drawn to scale.
Nimfa-mama [501]

Answer:

142 yards.

Step-by-step explanation:

See the attached diagram.

Let the reservoir is AC and Howard is standing at B and AB = 91 yards.

Now, the angle of elevation from B to the top of the reservoir C is 50°.

Then using trigonometry, \cos 50 = \frac{AB}{BC} = \frac{91}{BC}

⇒ BC = \frac{91}{\cos 50}  = 141.57 ≈ 142 yards.

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8 0
3 years ago
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Anna35 [415]
32% of 35 is 32% times 35, which is 11.2
7 0
3 years ago
Read 2 more answers
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zaharov [31]

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3 years ago
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