Calculate 0.124 × 0.06.

Calculate 0.124 × 0.06.

• A. 0.0744
• B. 0.00744
• C. 0.744
• D. 7.44

Answer: (B)

When you multiply decimals, treat them like whole numbers and then put the decimal point in the product. The number 0.124 has three digits after the decimal, and 0.06 has two digits after the decimal, so the product must have 3 + 2 = 5 digits after the decimal. Compute 124 × 6 = 744. Put the decimal point five places from the right in 744, giving 0.00744. Another way to see it is 0.124 = 124/1000 and 0.06 = 6/100, so their product is 744/100000 = 0.00744. The other options don’t fit because they would require a different number of digits after the decimal than the total needed (five). The correct result is 0.00744.

When you multiply decimals, treat them like whole numbers and then put the decimal point in the product. The number 0.124 has three digits after the decimal, and 0.06 has two digits after the decimal, so the product must have 3 + 2 = 5 digits after the decimal.

Compute 124 × 6 = 744. Put the decimal point five places from the right in 744, giving 0.00744.

Another way to see it is 0.124 = 124/1000 and 0.06 = 6/100, so their product is 744/100000 = 0.00744.

The other options don’t fit because they would require a different number of digits after the decimal than the total needed (five). The correct result is 0.00744.