Explain how you know the numbers of the decimal places that should be in the product when you multiply two decimal numbers together

Answers

When you multiply a decimal with a decimal, you just multiply like you would with whole numbers. Then, you count the numbers to the right of the decimal for both multiplicand an multiplier. If the equation was 8.374 x 1.234, then you would put the decimal 6 spots to the left of the product. For the first step of solving this is just multiply like and decimal is not there. The answer would be 10333516. Then you count the number right of the multiplicand and the multiplier. In total there is 6 numbers, so you put the decimal 6 spots to the right. The end result would be 10.333516. Hope this helped!
Say if i had 21.1 x22.2 and if you lined it up you would put your decimal straight dow say if you had 1.1 x4.67 you whould put the 4.67 at the top then you would put the one under the 4 then put you decimal down take the other 1 and put ot under the 6 be hind the second one you put a zero but you dont't have to i hoped this help you and also you can look how many decimals are an start at the tight and move 123456789 decimal spaces
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If 10 × 15 is 150, without multiplying what do you know about the product of 30 × 15?  a) the produc

the length and the width are inversely proportional to each other (l=\frac{36}{w} or w=\frac{36}{l})

Step-by-step explanation:

Let

l units = length of the rectangle,

w units = width of the rectangle.

The area of the rectangle is

\text{Area}=\text{Length}\cdot \text{Width}

A rectangle has an area of 36 square units, so

l\cdot w=36

Complete the table with some values of l and w that fit the previous formula:

\begin{array}{ccc}\text{Length}&\text{Width}&\text{Area}\\ \\36&1&36\cdot 1=36\ un^2.\\18&2&18\cdot 2=36 \ un^2.\\12&3&12\cdot 3=36\ un^2.\\ 9&4&9\cdot 4=36\ un^2.\\l&w&l\cdot w=36 \ un^2.\end{array}

As you can see, the length and the width are inversely proportional to each other (l=\frac{36}{w} or w=\frac{36}{l})

Suzi did

Step-by-step explanation:

Yes they do have 10^2 power on your calculator.

Look for the ^ key or Exp or y^x or x^y. Most scientific calculators have one of those.

Suzi did it correctly. 0.721 * 100 is a decimal move two places to the right. That would bring the decimal between the 2 and the 1.

David got it correctly

Step-by-step explanation:

5.6 x 10=56 not 0.56

7.21 X 100=  721 not 0.721

72.1

Step-by-step explanation:

Suzi

1/10 times 1/10 is 1/100

Step-by-step explanation:

this is the same as 0.1

0.214 * 0.32 = 0.06848 (3 + 2 = 5 decimal places)

0.7 * 0.11 = 0.077 (1 + 2 = 3 decimal places)

Step-by-step explanation:

Let's remember that multiplying decimals is the same as multiplying whole numbers except that you have to put the decimal point in the answer. When you multiply decimals, the decimal point is placed on the product so that the number of decimal places in the product is the sum of the decimal positions of the factors.

Example:

214 * 32 = 6,848

0.214 * 0.32 = 0.06848 (3 + 2 = 5 decimal places)

7 * 11 = 77

0.7 * 0.11 = 0.077 (1 + 2 = 3 decimal places)

0.214 * 0.32 = 0.06848 (3 + 2 = 5 decimal places)

0.7 * 0.11 = 0.077 (1 + 2 = 3 decimal places)

Step-by-step explanation:

Let's remember that multiplying decimals is the same as multiplying whole numbers except that you have to put the decimal point in the answer. When you multiply decimals, the decimal point is placed on the product so that the number of decimal places in the product is the sum of the decimal positions of the factors.

Example:

214 * 32 = 6,848

0.214 * 0.32 = 0.06848 (3 + 2 = 5 decimal places)

7 * 11 = 77

0.7 * 0.11 = 0.077 (1 + 2 = 3 decimal places)



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