Decimals Worksheet - Unit 3 Page 16
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38® To multiply 0.0138 by 9, multiply the
T o estimate, I
whole numbers: 138
9
use compatible numbers.
0.0138 is close to 0.01.
138
0.01 is 1 hundredth.
9
One hundredth multiplied by 9 is 9 hundredths.
72
Nine hundredths are close to 10 hundredths,
270
or 1 tenth.
900
Place the decimal point so the product
1242
is close to 1 tenth; that is:
Estimate to place the decimal point.
0.1242
So, 0.0138
9
0.1242
Use Base Ten Blocks.
1.
Multiply.
0.6
4
0.12
3
0.21
2
a)
b)
c)
0.34
5
0.215
3
0.408
2
d)
e)
f)
Copy this place-value chart.
2.
Multiply. Record each product in the chart.
Ten-
Ones
Tenths
Hundredths
Thousandths
Thousandths
0.005
7
0.42
9
0.029
5
a)
b)
c)
0.0328
9
0.276
6
0.1036
8
d)
e)
f)
Multiply. Describe your strategies.
3.
0.9
3
0.25
6
0.018
4
a)
b)
c)
0.09
3
0.025
6
0.0018
4
0.009
3
0.0025
6
0.000 18
4
What patterns do you see?
101
Unit 3 Lesson 4
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