Decimal Operations 7

Big Money Pedro bought a steak that weighs 1.4 pounds. The price is $4.50 per pound. How much does the steak cost?

• $4.20

• $6.90

• $22.50

• $6.30

Answer explanation

To find the cost of the steak, multiply its weight by the price per pound: 1.4 pounds * $4.50/pound = $6.30. Therefore, the correct answer is $6.30.

If you multiply 0.73 by 2.52, how many times would you move the decimal?

• 2

• 3

• 4

• 5

Answer explanation

To multiply 0.73 (2 decimal places) by 2.52 (2 decimal places), you add the decimal places: 2 + 2 = 4. Thus, you move the decimal 4 places to the right in the final answer.

4 x 0.03

• 12

• 0.12

• 120

• 0.012

Answer explanation

To calculate 4 x 0.03, multiply 4 by 3 to get 12, then move the decimal point two places left (since 0.03 has two decimal places), resulting in 0.12. Thus, the correct answer is 0.12.

Add the decimal into this number:
2.39 x 4.37 = 104443

• 10.4443

• 104.443

• 10444.3

• 1.04443

Answer explanation

To find the correct placement of the decimal, multiply 2.39 (2 decimal places) by 4.37 (2 decimal places), giving a total of 4 decimal places. Thus, 104443 becomes 10.4443 when the decimal is placed correctly.

0.53 * 6.4

• 0.3392

• 3.392

• 33.92

• 339.2

Answer explanation

To calculate 0.53 * 6.4, multiply the two numbers: 0.53 * 6.4 = 3.392. Therefore, the correct answer is 3.392.

7.9-3.47=

• 11.37

• 4.43

• 3.32

• 4.37

Answer explanation

To solve 7.9 - 3.47, align the numbers by the decimal point: 7.90 - 3.47 = 4.43. Thus, the correct answer is 4.43.

55.78+4.6=

• 60.28

• 55.32

• 56.44

• 60.38

Answer explanation

To solve 55.78 + 4.6, align the numbers by the decimal point: 55.78 + 4.60 = 60.38. Thus, the correct answer is 60.38.

94-4.8=

• 89.2

• 5.4

• 90.80

• 98.8

Answer explanation

To solve 94 - 4.8, subtract 4.8 from 94. This gives 89.2, which is the correct answer. The other options do not match the result of the calculation.

In a division problem when there is a decimal in the dividend but not in the divisor, what do I do first?

• Ignore the decimal

• Move the decimal to make the dividend a whole number

• Move the decimal straight up in the quotient

• Erase the decimal

Answer explanation

In division, when the dividend has a decimal and the divisor does not, you move the decimal straight up into the quotient. This helps maintain the correct value of the quotient while simplifying the division process.

If there is a decimal in the divisor, what must be done first?

• The divisor must be made a whole

• The decimal gets moved into the dividend

• Divide like normal

• Erase the decimal

Answer explanation

When the divisor has a decimal, the first step is to make it a whole number. This is done by moving the decimal point to the right and adjusting the dividend accordingly, ensuring both numbers are scaled equally.