Multiply by Powers of Ten
What's the problem
Whole number
Two Decimals
I should know this
100
Which direction do I move the decimal point when I multiply by 0.1, 0.01, or 0.001
To the Left
<---------
100
0.35 or thirty-five hundredths
100
1 x 0.71
0.71
100
7.9 x 3.4
26.86
100
How many places will be behind the decimal in your answer.
3.4 x 5.2
two places
200
Which direction do I move the decimal point when I multiply by 10, 100, or 1,000
To the Right
------>
200
Write the multiplication problem shown in the picture.
2 x 0.25
200
3 x 0.25
0.75
200
9.2 x 5.6
51.52
200
102 is equal to what number or multiplication problem
100
10 x 10
300
Which direction do I move the decimal point when I multiply by 101, 102, or 103
To the Right
------>
300
Write the multiplication problem shown by the picture.
3 x 0.27
300
2 x 0.8
1.6
300
3.45 x 9.7
33.465
300
What number is shown?
(2 x 10) + (3 x 1/10) + (9 x 1/100) + (7 x 1/1000)
20.397
400
38 x 0.01
0.38 or thirty-eight hundredths
400
Write the multiplication problem shown in the picture.
4 x 0.07
400
9 x 0.12
1.08
400
45.3 x 0.8
36.24
400
What digit should go in the box to make the following statement true?
63.749 < 63. __2
8 or 9
500
102 x 17.04
1,704 or one thousand seven hundred four
500
Write the multiplication problem shown in the picture two ways using different numbers. (__ x ___ = ___)
2 x 0.45
10 x 0.09
500
3 x 0.45
1.35
500
7.02 x 3.4
23.868
500
Mandy, John, and Kelly went to an amusement park. Mandy spent $16.25. John spent $3.40 more than Mandy. Kelly spent 2 times as much as John. How much did Kelly spend?
16.25 + 3.40 = 19.65
19.65 x 2 = $39.30
Kelly spent $39.30