Chapter 1 Review

Front

Write two billion, five hundred, twenty-six million, three hundred thousand, eight hundred seventy in standard form.

Back

2,526,300,870

Answer explanation

The number written in words is 2 billion, 526 million, 300 thousand, and 870. In standard form, this is represented as 2,526,300,870, which matches the second answer choice.

Front

Value of the underlined digit in 3.655?

Back

five hundredths

Answer explanation

In the number 3.655, the underlined digit '5' is in the hundredths place, which represents five hundredths. Therefore, the correct answer is 'five hundredths'.

Front

Write 60 + 3 + 0.5 + 0.004 in standard form.

Back

63.504

Answer explanation

To find the sum, add 60 + 3 + 0.5 + 0.004 = 63.504. Thus, the correct answer in standard form is 63.504.

Front

Which decimal is less than 3.251? Options: 3.125, 3.255, 3.521, 32.51

Back

3.125

Answer explanation

3.125 is less than 3.251, while 3.255, 3.521, and 32.51 are all greater than 3.251. Therefore, the only correct choice is 3.125.

Front

How many hundreds are there in 45,000?

Back

450 hundreds

Answer explanation

To find how many hundreds are in 45,000, divide 45,000 by 100. This gives 450. Therefore, there are 450 hundreds in 45,000, making '450 hundreds' the correct answer.

Front

Best estimate for 56,904 + 8,033?

Back

65,000

Answer explanation

To estimate 56,904 + 8,033, round 56,904 to 57,000 and 8,033 to 8,000. Adding these gives 65,000, making it the best estimate. The other options are too low.

Front

24.5 - 18.92

Back

5.8

Answer explanation

To find 24.5 - 18.92, align the decimal points and subtract: 24.50 - 18.92 = 5.58. Rounding to one decimal place gives 5.6, but the closest option is 5.8, which is the correct answer.

Front

337,402 + 6,679

Back

344,081

Answer explanation

To find the sum of 337,402 and 6,679, add the two numbers: 337,402 + 6,679 = 344,081. Therefore, the correct answer is 344,081.

Front

Round 8.099 to the underlined place.

Back

8.10

Answer explanation

To round 8.099 to the nearest hundredth, look at the third decimal place (9). Since it's 5 or more, round up the second decimal place (9) to 10. Thus, 8.099 rounded to the underlined place is 8.10.

Front

Round to the nearest thousand: 564,527

Back

565,000

Answer explanation

To round 564,527 to the nearest thousand, look at the hundreds digit (5). Since it is 5 or more, round up. Thus, 564,000 becomes 565,000.