Question

321.65 + 53.721 - 87.23 with method ​

Answer 1

Answer:

288.141

Step-by-step explanation:

this type of questions we call it simplify

now we have to do just simple addition and subtraction.

so. there are decimal numbers .

1st we do addition then subtraction.

okay

we write :

3 2 1 . 6 5

+ 5 3 . 7 2 1

now we will add but you have to see that numbers after decal point should be after decimal point only if it will at right side answer will be wrong okay so see the decimal point and I have also written that you can see above now after adding our answer is :

3 2 1 . 6 5

+ 5 3 . 7 2 1

3 7 5 . 3 7 1

now, our addition part is done .

now we do substraction from the answer of adding that two numbers .

3 7 5 . 3 7 1

– 8 7 . 2 3

2 8 8 . 1 4 1

so, here we got our answer .

hope this will help you .

thanks ❤️

Answer 2

Answer:

Given, −13824.

The unit's digit of 13824 is 4, so 4 is the unit's digit of the cube root....[Since, 4

3

=64].

Now, grouping the three digits from the right, the number left is 13.

We know, 2

3

=8<13<27=3

3

.

⇒ 2 is the ten's digit of the cube root of 13824.

Then, 24 is the cube root of 13824.

∴ −24 is the cube root of −13824.

Hence, option A is correct.