Unit 1 Math Review

10 Times or 1/10 Of

100

In the number 7,777.777 the 7 in the ones place is ___ the 7 to its right. (10 times or 1/10 of)

10 times

200

In the number 4,444.444 the 4 in the hundredths place is ___ the 4 to its left. (10 times or 1/10 of)

1/10 of

300

The value of the 4 in 324.18 is ___ the value of the 4 in 143.25 (10 times or 1/10 of)

1/10 of

400

The value of the 7 in 19.78 is ___ the value of the 7 in 43.57 (10 times or 1/10 of)

10 times

500

The value of the 2 in 9,754.27 is 10 times the value of the 2 in which number? a)3724.76 b.)1678.42 c.)9203.14 d.)1532.18

b) 1678.42

Powers of 10

100

10⁷ = _________ a)100,000,000 b)10,000,000 c)100,000 d)70

b) 10,000,000

200

When a whole number is multiplied by 10² the product is that number with ____ zeros added to the end.

2 zeros

300

When a number is divided by 10³, the decimal moves ____ places to the ____.

3 places to the left

400

4.39 x 10³ = ? a)439 b)4,390 c)43.9 d)0.439

b) 4,390

500

34.8 divided by 10² = ?

0.348

Standard, Word& Expanded Forms of Decimals

100

How does the decimal 4.007 read?

four and seven thousandths

200

How is the number eighteen and seven hundred seventy-four thousandths written in standard form?

18.774

300

Write the following in standard form: (4 x 10) + (3 x 1) + (1 x 1/10) + (8 x 1/1,000)

43.108

400

Write the following in expanded form: 469.2

(4x100)+(6x10)+(9x1)+(2 x 1/10) OR 400+60+9+.2

500

Write the following in expanded form: 958.091

(9x100)+(5x10)+(8x1)+(9x.01)+(1x.001) OR 900+50+8+0.09+0.001

Compare & RoundDecimals

100

0.6 __ 0.61

<

200

245.217 ___ 245.215

>

300

Round 3.249 to the nearest hundredth.

3.25

400

Amanda measures the mass of a rock to be 1.64 g. She rounds the number to the nearest tenth. What is the new number?

1.60 g

500

Brittney rounded the mass of an object to 2.5 kg. What could be the actual mass of the object?

Answers accepted if the digit in the hundredths place is less than 5. (ex: 2.51, 2.54, etc..) 

Metric System

100

List the metric system prefixes in the correct order.

kilo-hecto-deka-unit-deci-centi-milli

200

____ millimeters = 55 centimeters

550 millimeters

300

Convert 26 kilometers to meters.

26,000 meters

400

Convert 4,200 centiliters to liters.

42 liters

500

Granny Burgess uses 8 kilograms of candy corn to fill 10 bags with equal amounts. She has 423 grams left over. How many grams of candy corn are in each bag?

800 grams (8kg candy corn/10 bags = 0.8kg Then convert kg to g which is 0.8 kg x10³=800g)