x by 10's
When multiplying a decimal by a power of 10, which direction do you move the decimal point?
to the right
1.2 x 4=
4.8
How many places over is the decimal in the product for 12.34 x 654.674=
5
When dividing a decimal by a power of 10, which direction do you move the decimal point?
left
5.4 divided by 9=
.6
When multiplying by a power of 10, how do you know how many places over to move your decimal point?
By the number of zeros in the factor. For example, multiply by 100 so you would move your decimal point 2 places since there are 2 zeros.
True of false
You need to line up your decimal points when multiplying.
False
How many places over is the decimal in the product for
345.54 x .5=
3
When dividing by a power of 10, how do you know how many places over to move your decimal point?
count the number of zeros in the divisor
43.2 divided by 9=
4.8
2.79 x 100 =
279
If there is no decimal point in a number, where is the hidden decimal point, or the decimal point that can be dropped?
At the end of the number.
How many places over is the decimal in the product for
345.556 x .456 =
6
4.36 divided by 10=
.436
.28 divided by .7=
.4
3.09 x 1,000=
3,090
8.7 x 7=
60.9
Solve
4.3 x .12=
.516
4.64 divided by 100=
.0464
.027 divided by .9=
.03
.15 x 1,000
150
32.9 x 8=
263.2
solve
2.3 x .13
.299
65.245 divided by 1,000=
.065245
228 divided by .003=
76,000