10/4 Math Review

The mass of a box in kilograms is shown in expanded notation below.

(5 x 100) + (6 x 1) + (8 x 0.1) + (5 x 0.01)

What is this mass in kilograms, written as a numeral (standard form/decimal)?

Enter your answer in the space provided.

A list of numbers is shown.

42.5 42 42.63 42.172

Which comparison is true?

• A) 41.172 > 42.63 > 42.5 > 42

• B) 42.5> 42.63 > 41.172 > 42

• C) 41.172 > 42 > 42.5 > 42.63

• D) 42.63 > 42.5 > 42 > 41.172

Imogen rounds a decimal number to the nearest tenth, then records the rounded number as shown.

124.6

Which numbers could Imogen have rounded to the nearest tenth?

Select TWO correct answers.

• 124.06

• 124.55

• 124.056

• 124.51

• 124.615

Which hundredths model is shaded to represent the question 0.7 x 0.7=0.49?

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A person has $1.20 in pennies. The person makes 4 equal stacks of pennies. The equation 1.20 divided by 4 = 0.30 shows the value of each stack in dollars.

Which hundredths model best represents this situation?

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Sam had one string that was 20 meters long. He used 11.275 meters of this string for a project. What was the length of string in meters that Sam had left?

• 32.275 m

• 9.275 m

• 8.725 m

• 11.275 m

A chemist compares the amounts of water in two jars.

• Jar X contains 192.6 milliliters of water.

• Jar Y contains 705.2 milliliters of water.

• How many more milliliters of water does jar Y have than jar X? Use estimation to determine your answer.

A farmer has 155 rows of apple trees on an orchard. There are 32 apple trees in each row.

What is the total amount of apple trees on this orchard?

• 7,960

• 4.840

• 187

• 4,960

Which of these numbers are prime?

Select TWO correct answers.

• 2

• 25

• 49

• 13

• 1

The 3 computer monitors use a total of 0.87 watt of electricity. Each monitor uses the same number of watts.
How many watts does each monitor use?

• 2.9 watts

• 0.261 watt

• 2.61 watts

• 0.29 watt