If you can do multiplication of two integers without a calculator, then you can multiple an integer (a whole number) with a floating-point number (a number with decimals) without a calculator too.
For example, let us say you want (2.56 * 5).
2.56 * 5
= 2.56 * 5 /1 (I am not changing any value)
= 256 * 5 /100 (I am multiplying the numerator and denominator by 100)
= 1280 /100 (do my multiplication of two integers, 256 and 5)
= 12.8 (do the division)
Note that I am doing the process in the long-hand for illustration purpose. You can take short-cuts once you are comfortable with the process. For example, I shall go straight to multiplying 256 with 5 (ignoring the decimal point; it is like moving the decimal point two places to the right), get the answer, and then move the decimal point two places to the left to return the decimal point to the right location.
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http://en.wikipedia.org/wiki/Methods_of_computing_square_roots
You should be familiar with long division involving decimals
Try it out! Do the division! If there is no remainder - or, with a calculator, if you get a whole number without decimals - it is a multiple.
Of course! Without decimals, you couldn't calculate percentages or fractions. Decimals allow you to break a number up. A decimal is basically a fraction, and when you calculate fraction adding, subtraction, multiplication, and division, sometimes it is easier to calculate a fraction by first changing it to a decimal instead.
99 squared, written 992, is the same as 99 x 99 (multiply the number with itself). You can simply do the multiplication.
To square root decimals without a calculator, first convert the decimal into a fraction. For example, the square root of 0.64 can be expressed as √(64/100), which simplifies to √64/√100 = 8/10. Then, simplify the fraction to find the square root. Alternatively, you can estimate by finding the nearest perfect squares and refining your estimate through averaging or by using the long division method for square roots.
89 divide by 5 without decimals = 17.8
One cent without decimals can be expressed as 1/100
The IRS does offer a free taz refund calculator. If you vist their website, you should be able to quickly find what you are looking for without a problems!
Make them into decimals. Make them into decimals.
You can't. Multiple is how you do multiplication
The Egyptian multiplication method, also known as doubling and halving, simplifies multiplication by breaking down numbers into simpler parts. This method allows for multiplication using only addition and doubling, making it easier to perform without a calculator or advanced tools. It is particularly advantageous in ancient times or in environments with limited resources, as it relies on basic arithmetic principles. Additionally, it enhances understanding of multiplication through a visual and systematic approach.