Adding and Subtracting
0.36 + 0.45
0.81
Use <, >, = to compare the numbers.
5.63 5.73
5.63 < 5.73
Write the written and expanded form
0.65
sixty-five hundredths
(6 x 1/10) + (5 x 1/100)
5 / 575
115
When multiplying by the power of ten, which way does the decimal move?
Show an example
right
25.0 x 10 = 250.0
15.36- 3.01
12.35
Round to the nearest tenth
85.837
85.8
Write number form and expanded form
three hundred forty-seven thousandths
0.347
(3 x 1/10) + (4 x 1/100) + (7 x 1/1000)
7 / 148
21 r1
When dividing to the power of ten, which way does the decimal move?
Show an example with dividing by 100
left
7.0 / 100 = 0.70
23.69 + 4.3
28.09
Compare the decimal numbers using <, >, =
152.98 152.89
152.98 > 152.89
Write the written and number form.
(8 x 10) + (5 x 1) + (4 x 1/10) + (7 x 1/100)
85.47
eighty-five and forty-seven hundredths
12 / 3857
321 r 4
Finish this chart
10 ___ 1000 10000
1.55 _____ ______ 1550
10 100 1000 10000
1.55 15.5 155 1550
0.349 - 0.15
0.199
Round to the nearest hundredth.
6.986
6.99
Write the written and expanded form
1,589.64
One thousand five hundred eighty-nine and sixty-four hundredths.
21 / 9657
459 r 8
What happens to the number of zeros in the product as you multiply a number by powers of 10 (10, 100, 1000, and so on)? Why?
The number of zeros increases as the decimal moves right. For each power of ten, the number increases by 10 times its place value and the digits shift left by one place value.