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Subtract 35 from 86.

51

Subtract 382 from 541.

Subtract 1,841 from 5,246.

3,405

Subtract 26,082 from 35,040.

Find the difference between 47 and 21.

26

Find the difference between 1,005 and 314.

Find the difference between 72,085 and 16.

72,069

Find the difference between 7,214 and 2,049.

Find the difference between 56,108 and 52,911.

3,197

How much bigger is 92 than 47?

How much bigger is 114 than 85?

29

How much bigger is 3,006 than 1,918?

How much bigger is 11,201 than 816?

10,385

How much bigger is 3,080,020 than 1,814,161?

In Wichita, Kansas, the sun shines about 74% of the time in July and about 59% of the time in November. How much more of the time (in per­cent) does the sun shine in July than in No­vember?

15%

The lowest temperature on record in Concord, New Hampshire in May is 21°F, and in July it is 35°F. What is the difference in these lowest tem­peratures?

In 1980, there were 83,000 people arrested for prostitution and commercialized vice and 11,330,000 people arrested for driving while in­toxicated. How many more people were arrested for drunk driving than for prostitution?

11,247,000

In 1980, a person with a bachelor's degree in ac­counting received a monthly salary offer of $1,293, and a person with a marketing degree a monthly salary offer of $1,145. How much more was offered to the person with an accounting de­gree than the person with a marketing degree?

In 1970, there were about 793 people per square mile living in Puerto Rico, and 357 people per square mile living in Guam. How many more people per square mile were there in Puerto Rico than Guam?

436

The 1980 population of Singapore was 2,414,000 and the 1980 population of Sri Lanka was 14,850,000. How many more people lived in Sri Lanka than in Singapore in 1980?

In 1977, there were 7,234,000 hospitals in the United States and 64,421,000 in Mainland China. How many more hospitals were there in Mainland China than in the United States in 1977?

57,187,000

In 1978, there were 3,095,000 telephones in use in Poland and 4,292,000 in Switzerland. How many more telephones were in use in Switzerland than in Poland in 1978?

For the following problems, use the corresponding graphs to solve the problems.

How many more life scientists were there in 1974 than mathematicians? ( [link] )

165,000

How many more social, psychological, mathe­matical, and environmental scientists were there than life, physical, and computer scientists? ( [link] )

A graph entitled employment status of mathematical scientists - 1974. On the graph are histograms with scientific field titles, and a labeled number of the scientists holding the titles. There are 266,000 life scientists, 248,000 physical scientists, 170,000 computer scientists, 217,000 social scientists, 109,000 psychologists, 101,000, mathematicians, and 79,000 environmental scientists.

How many more prosecutions were there in 1978 than in 1974? ( [link] )

74

How many more prosecutions were there in 1976-1980 than in 1970-1975? ( [link] )

A graph entitled prosecutions of federal officials 1970-1980, with histograms of the years on the horizontal axis, and number of prosecutions on the vertical axis. The years in ascending succession had the following number of prosecutions, 9, 58, 58, 60, 59, 53, 111, 129, 133, 114, 123.

How many more dry holes were drilled in 1960 than in 1975? ( [link] )

4,547

How many more dry holes were drilled in 1960, 1965, and 1970 than in 1975, 1978 and 1979? ( [link] )

A graph entitled, oil wells -  dry holes drilled 1960-1979. The histograms of the years in the period are displayed along the horizontal axis. The number of holes are measured on the vertical axis. The number of holes drilled, for each consecutive year 1960, 1965, 1970, 1975, 1978, and 1979, are 17,577, 15,967, 10,786, 13,030, 15,559, 15,201.

For the following problems, replace the ☐ with the whole number that will make the subtraction true.

14 - ̲ 3

11

21 - ̲ 14

35 - ̲ 25

10

16 - ̲ 9

28 - ̲ 16

12

For the following problems, find the solutions.

Subtract 42 from the sum of 16 and 56.

Subtract 105 from the sum of 92 and 89.

76

Subtract 1,127 from the sum of 2,161 and 387.

Subtract 37 from the difference between 263 and 175.

51

Subtract 1,109 from the difference between 3,046 and 920.

Add the difference between 63 and 47 to the dif­ference between 55 and 11.

60

Add the difference between 815 and 298 to the difference between 2,204 and 1,016.

Subtract the difference between 78 and 43 from the sum of 111 and 89.

165

Subtract the difference between 18 and 7 from the sum of the differences between 42 and 13, and 81 and 16.

Find the difference between the differences of 343 and 96, and 521 and 488.

214

Exercises for review

( [link] ) In the number 21,206, how many hundreds are there?

( [link] ) Write a three-digit number that has a zero in the ones position.

330 (answers may vary)

( [link] ) How many three-digit whole numbers are there?

( [link] ) Round 26,524,016 to the nearest million.

27,000,000

( [link] ) Find the sum of 846 + 221 + 116 size 12{"846"+"221"+"116"} {} .

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Source:  OpenStax, Contemporary math applications. OpenStax CNX. Dec 15, 2014 Download for free at http://legacy.cnx.org/content/col11559/1.6
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