A fraction with a numerator as a power of ten.
A decimal fraction is a fraction where the denominator is a power of ten, usually expressed with a decimal point.
A fraction only consisting of whole numbers.
A decimal representation of a mixed number.
Multiply as fractions and then convert to decimals.
To multiply decimal fractions, multiply them as whole numbers, then count and place the decimal point in the product based on the sum of decimal places in the factors.
Convert to fractions first, then multiply and convert back to decimal.
Subtract the decimals, and apply the same process.
0.09
0.18
1.8
1.80
Rotate the decimal in each number once.
Round to the nearest whole number.
Count the total number of decimal places in both factors and place the decimal in the product accordingly.
Use an arbitrary rule based on the factors involved.
0.02
10.0
0.1
0.05
20
An estimate would be roughly 10, as 2 times 5 equals 10.
5
0.5
Yes, for all decimal numbers.
Yes, if both numbers are greater than 1.
Not necessarily. It depends on the factors. If both are less than 1, the product is smaller.
No, decimal multiplication always increases numbers.
4.4
0.408
4.08
3.08
One decimal place.
Two decimal places should be in the product.
Three decimal places.
No decimal places.
0.10
0.25
1.0
0.20
By always getting a calculator.
You can verify by estimating, checking with a calculator, or reversing the operation (division).
Using only estimation methods.
There is no way to verify.
The decimal point is shifted to the left.
The number is divided by 10.
The decimal point shifts one place to the right, effectively increasing the number by a factor of 10.
It remains the same.
5.0
5.4
4.5
6.0
No, multiplying by 1 leaves the decimal number unchanged.
Yes, it increases the number.
Yes, it decreases the number.
It squares the number.
0.98
0.09
4.5
0.02