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vodomira [7]
4 years ago
10

How is using mental math to add with decimals like using mental math to add whole numbers

Mathematics
1 answer:
oksian1 [2.3K]4 years ago
8 0
Add them up just the same, then add the decimal point in the proper position; once you hit the hundreds position, it is a whole number. I.E. 300=.3
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I think the answer is 74088 I’m not sure pls help!!
zepelin [54]

Answer:

yes you are correct

Step-by-step explanation:

6 times 6 times 6 times 7 times 7 times 7 is 74088

8 0
3 years ago
NEED QUICKLY <br> GEOMETRY 20 POINTS
sp2606 [1]

Answer:

10.24 in²

Step-by-step explanation:

First we need to know how to find the area of a rectangle, which is base * height.

We can notice that the base and height are both 3.2, so we multiply 3.2*3.2.

To do this, we first have to completely ignore the decimal points. Just pretend you're multiplying 32*32, to get 1024. Then, we count how many numbers are past the decimal point on each number. On both, there is 1 number past, and we add those together to get 2 numbers past the decimal point.

We then, finally, make the number we got (1024) have 2 numbers past the decimal point, so instead of 1024, we have 10.24, which is our answer!

4 0
4 years ago
Molly needs to classify the triangle below based on angles. Which class is correct? 60° 50° 70° A. acute triangle О B. isosceles
Art [367]

Answer:

A. Actute triangle

Step-by-step explanation:

Is A because an acute triangle is a triangle where all the angles are the same.

Can not be B. because isosceles triangles have two sides that are the same which doesn't relate to angles.

Can not be C. because equilatiral triangles are triangles with sides that are all the same.

Can not be D. because for a triangle to be obtuse one of the angles needs to be greater that 90 degrees.

So it has to be A.

7 0
3 years ago
If z varies inversely as w and z=40 when w=0.1, find z when w=20
Alex_Xolod [135]
Z varies inversely as w ⇒  z*w=k
z=40 , w=0,1 ⇒40*0,1=4=k

z*20=4
z=4/20=1/5
z=0,2
4 0
3 years ago
The population in the South in 2000 was 100,236,820. In 2010, the population in the South had increased by 14.3% from 2000. Abou
Vaselesa [24]

Answer:

114,570,685.26

Step-by-step explanation:

100,236,820 x 14.3% = 14,333,865.26

100,236,820 + 14,333,865.26 = 114,570,685.26

4 0
4 years ago
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