When should you move the decimal point two places to the right?

When should you move the decimal point two places to the right?

The trick is to count the number of zeros in the power of 10 number you are multiplying with and that is the number of spaces you need to move the decimal point. For example, if you are multiplying 1.234 x 100, there are two zeros in 100, so you move the point two times to the right to get the answer: 123.4.

When multiplying decimals does the decimal go left or right?

The difference is that the decimal point moves to the right when you multiply; it moves to the left when you divide.

How do you know when to move a decimal?

If there IS a decimal point, move it to the right the same number of places that there are 0s. When dividing by 10, 100, 1000 and so on, move the decimal point to the left as many places as there are 0s. So when dividing by 10, move the decimal point one place, by 100 two places, by 1000 three places and so on.

What are the decimal places to the right?

If a number has a decimal point , then the first digit to the right of the decimal point indicates the number of tenths. For example, the decimal 0.3 is the same as the fraction 310 . The second digit to the right of the decimal point indicates the number of hundredths.

How do you move 3 decimal places?

Example

1. Round this number to 3 decimal places.
2. Count along the first 3 numbers to the right of the decimal point.
3. Count along the first 3 numbers to the right of the decimal point.
4. Count along the first 3 numbers to the right of the decimal point.
5. Look at the next number (the 4th number after the decimal place)

What happens when you move the decimal to the left?

To write a number in scientific notation: value of the exponent. – If you moved the decimal point to the left, make the exponent positive. – If you moved the decimal point to the right, make the exponent negative.

How do you calculate 2 decimal places?

Rounding to decimal places

1. look at the first digit after the decimal point if rounding to one decimal place or the second digit for two decimal places.
2. draw a vertical line to the right of the place value digit that is required.
3. look at the next digit.
4. if it’s 5 or more, increase the previous digit by one.

How many is 4 decimal places?

1 decimal place (tenths) 2 decimal places (hundredths) 3 decimal places (thousandths) 4 decimal places (ten-thousandths)

What happens when you move the decimal point to the right?

In effect, adding a 0 to the end of a whole number moves the decimal point one place to the right. So, for any decimal, when you move the decimal point one place to the right, you multiply that number by 10. This becomes clear when you start with a simple number like 7: In this case,…

When do you move decimals in a divisor?

If the divisor is not a whole number, the decimal places need to be moved in both the divisor and dividend to make sure that the decimal in the quotient is correctly placed. First, move the decimal point in the divisor to the right to make the number into a whole number, or integer.

How do you change the value of a decimal point?

Move the Decimal Point to Change a Number’s Value When you’re working with whole numbers, you can multiply or divide any number by 10 just by moving the decimal point to the right or left, respectively. When you multiply by moving the decimal point to the right, you also need to add a zero to the end of it.

Where does the decimal go in a long division?

Long division is performed by placing the decimal point in the answer directly above the decimal point in the number being divided. In this case, the answer 7.48 has the same number of decimal places as the dividend.