What are the prefixes and abbreviations for tens and tenths?

What are the prefixes and abbreviations for tens and tenths?

• A. Deca and Deci
• B. Da and D
• C. Kilo and Milli
• D. Hecto and Centi

Answer: (B)

Understanding SI prefixes for powers of ten and their symbols is key here. Tens are represented by the deka prefix, abbreviated as da. Tenths are represented by the deci prefix, abbreviated as d. The pairing Da and D is the best answer because it matches the correct prefixes with their standard abbreviations for 10 and 0.1. The other options either give the full names without abbreviations, or link to different powers of ten (like kilo for 10^3 or milli for 10^-3, and hecto with centi for 10^2 and 10^-2), which don’t describe tens or tenths.

Understanding SI prefixes for powers of ten and their symbols is key here. Tens are represented by the deka prefix, abbreviated as da. Tenths are represented by the deci prefix, abbreviated as d. The pairing Da and D is the best answer because it matches the correct prefixes with their standard abbreviations for 10 and 0.1. The other options either give the full names without abbreviations, or link to different powers of ten (like kilo for 10^3 or milli for 10^-3, and hecto with centi for 10^2 and 10^-2), which don’t describe tens or tenths.