0.06 and 0.2 represent fractions with denominators of 100 and 10, respectively. ().
The product of these fractions will have a denominator of 1,000 (100 x
10). This means that the product of the decimals will have 3 decimal
places. Whew! We haven't moved this many dots since we worked in the gum
Now that the denominator is taken care of, let's
have a look-see at the numerator. 0.06 and 0.2 represent fractions with
numerators of 6 and 2, respectively. Multiply 0.06 and 0.2, ignoring the
decimal points, to get 12.
12 is not our final answer, of course,
as we still haven't applied our denominator. Since we know the product
of 0.06 and 0.2 will have 3 decimal places, we move the decimal point 3
places to the left to get our solution: 0.012. Now towel that decimal
place off and get him some Gatorade - that was a workout!
Solve 0.004 × 0.73
We know the product will have 5 decimal places. Multiply 0.004 and 0.73,
ignoring the decimal points. In other words, just multiply 4 and 73 to
get 292. Then move the decimal point left 5 places to the left to get
the correct final answer. (Remember, we only move the decimal place to
the right during multiplication when we're multiplying by a power of 10.
No power of 10 here. We're looking pretty powerless.)