Place Value
Rounding and Estimation
Multiplying and Dividing by Tens
Fractions. Decimals, Percents
100
Write the number 0.0009 as you would say it out loud.
nine ten-thousandths
100
Suppose you are flying from Detroit to San Francisco. The airline allows for a maximum of 40 pounds of carry-on luggage. In your luggage you want to put an 11.5 pound CD player, clothes weighing 15. 35 pounds, makeup weighing 1.65 pounds, and books weighing 9.45 pounds. a)Estimate to the nearest higher pound the total weight of the items. b) Will you be able to take everything with you?
a) 12+15+2+9=38 pounds b) Yes, this is less than 40 pounds, but you should consider the weight of the bag so this would be very close.
100
Write how to multiply by 100
Move the decimal to the right two places because there are two zeros.
100
Write 4/5 as both a decimal and a percent
.8, 80%
200
The the decimal (number form) for 3.4 trillion
3,400,000,000
200
Round 45.9725 to: a) the nearest tenth b) the nearest hundredth c) the nearest thousandth
a) rounds up to 46.0 b) rounds down to 45.97 c) rounds up to 45.973
200
Write how to multiply by the fraction 1/1,000,000
Move the decimal to the left to divide. Move six spaces because there are six zeros.
200
Write .25 as both a simplified fraction and a percent.
1/4 and 25%
300
In the number 0.081672, what place is the 7 in?
Hundred thousandths
300
Which is 3,629,610 rounded down to the preceding thousand? A) 3,629,400 B) 3,629,000 c) 3,620,000 C) 3,630,000
B is the correct answer
300
Write how to multiply by .000001? (hint: say it out loud first)
Say the number out loud, to turn it into the fraction in 1/1,000,000,000 Then count the zeros and move the decimal to the left.
300
Write 130% as both a decimal and a fraction in simplest form
1.3, 1 and 3/10
400
In the number 0.081672, what place is the 8 in?
Hundredths
400
Round -351 up to the next ten. (Think about a number line and what is moving closer to zero!)
-350
400
7.23 x 1/1000
.00723
400
Write 63.1% as a decimal and as a fraction
631/1000 .631
500
Which of these numbers would NOT be between 27. 985 and 27.8957 on a number line? (hint: draw the number line first!) 27.8951, 27.89523, or 27.89623
27.89623 would NOT be between the original numbers on a number line.
500
Round -6,429 down to the preceeding 100
-6,500
500
45.9876 x .001
.0459876
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