Exponents & Powers of 10
Whole Numbers
Decimals to Thousandths
Comparing Decimals
Rounding Decimals
100
How many zeros will be in the product of:
2 x 102
Two Zeros
2 x 102 = 2 x 10 x 10 = 200
100
What is the value of the number in the hundreds place?
6,542
500 or Five Hundred
100
How is 0.23 written as a fraction?
23 / 100
100
Is 10.43 less than 10.430?
Both numbers have the same whole number, 10. Both numbers have a 4 in the tenths place. Both numbers have a 3 in the hundredths place. There is no number in the thousandths place for either number. So, the decimals are equal, or equivalent! Therefore, 10.43 is not less than 10.430.
100
Round 1.562 to the nearest tenths place.
1.600
200
How many zeros will be in the product of:
5 x 104
Four Zeros
5 x 104 = 5 x 10 x 10 x 10 x 10 = 50,000
200
Write the number 5,210 in expanded form.
(5 x 1,000) + (2 x 100) + (1 x 10)
200
Write 682/1000 as a decimal.
0.682
200
Valerie said, “12.68 is greater than 12.8 because 68 is greater than 8.”
No; 12.8 has 8 tenths, and 12.68 only has 6 tenths. So, 12.8 is greater than 12.68.
200
Round 1.236 to the nearest hundredths place.
1.240
300
One box of printer paper has 
sheets of paper. What is the total number of paper in the box?
300 sheets.
3 x 10 x 10 = 300
300
Write the following number in standard form:
20,000 + 60 + 5
20,065
300
Write 0.065 as a fraction
65 / 1000
300
Write a > , < , or =
5.731 _____ 5.693
>
5.731
300
Round 2.912 to the nearest whole number.
3.000
400
Are both of the following expressions equal to 7 x 105?
7 x 10,000
7 x 10 x 10 x 10 x 10 x 10
Nope!
7 x 100,000 (It was missing a zero!)
400
The 7 in 8,572,263 has what value?
70,000
400
Write 5 / 1000 as a decimal
0.005
400
Write a > , < , or =
9.706 _____9.716
<
9.716
400
Round 5.6142 to the nearest thousandths place.
5.6140
500
Jill says there will be 5 zeros in the product
20 x 105
Is she correct?
No! She forgot about the zero in 20.
Multiplying by 10 x 10 x 10 x 10 x 10 results in 5 zeros. Because the zero in 20 results in an additional zero in the product, the final product has six zeros.
500
In the number 4,444 is it true that each digit has a value 10 times the value of the digit to it's right?
Yep! Each place value as we move to the left is 10x greater. (Think about why we add "one more zero!")
500
Jess said 98 / 1000 can be written as 0.98 is she correct?
No, 98/1000 is written as 0.098.
0.98 = 98/100
500
Put these numbers in order from least to greatest:
1.742, 1.558, 1.567
1.558, 1.567, 1.742
500
When would you choose to use rounding instead of needing to be specific?
-Estimating population
-Buying things in bulk, rounding up!
-Planning ahead to save money
-Will I have enough money to buy ____?