Ask a New Question
Menu

It’s time for Spiral Review! This review will help you remember some of the things you have already learned. Take your time and try your best.

How many decimal places will there be in the product of 8.09 and 2.6?
1 decimal place
2 decimal places
3 decimal places
4 decimal places
Answer:
Estimate the product of 252.8 x 63.4 by rounding each number to the nearest 10.
15,000
15,939
16,000
16,027.42
Answer:
Which expression is equivalent to 0.09 x 27.3?
(0.9x2.73)x (100x10)
(0.9x2.73)x(1/10x1/100)
(9x273)x(1/100x1/100)
(9x273)x(1/100x1/10)

Answer:
Noah earns $9.65 per hour. How much will he earn next week if he works 18 hours?
$169.30
$173.70
$174.30
$1,737.00
Answer:
Is the decimal point placed correctly in the product? If not, rewrite the product correctly. 0.06 x 54.3= 32.58
Answer:

1 answer

Let's work through each question step by step:

  1. How many decimal places will there be in the product of 8.09 and 2.6?

    • 8.09 has 2 decimal places.
    • 2.6 has 1 decimal place.
    • Total: 2 + 1 = 3 decimal places.
    • Answer: 3 decimal places.

  2. Estimate the product of 252.8 x 63.4 by rounding each number to the nearest 10.

    • 252.8 rounds to 250.
    • 63.4 rounds to 60.
    • Estimated product: 250 x 60 = 15,000.
    • Answer: 15,000.

  3. Which expression is equivalent to 0.09 x 27.3?

    • 0.09 can be expressed as 9/100, and this can also be split as (9 x 27.3) / 100.
    • The options suggest certain forms, and rearranging using factors of 10 shows:
      • The correct equivalent expression would be (9 x 273) x (1/100 x 1/100).
    • Therefore:
    • Answer: (9x273)x(1/100x1/100).

  4. Noah earns $9.65 per hour. How much will he earn next week if he works 18 hours?

    • Earnings = hourly wage x hours worked = 9.65 x 18.
    • 9.65 x 18 = 173.70.
    • Answer: $173.70.

  5. Is the decimal point placed correctly in the product? If not, rewrite the product correctly. 0.06 x 54.3 = 32.58

    • Calculate the product:
      • 0.06 x 54.3 = 3.258.
    • The given answer 32.58 is incorrect; it should be 3.258.
    • Answer: No, the correct product is 3.258.

Please let me know if you need further assistance!