Add 0.3 and 0.75.

Add 0.3 and 0.75.

• A. 0.93
• B. 1.05
• C. 1.0
• D. 1.15

Answer: (B)

Lining up the decimal points and adding by place value is how you add decimals correctly. Treat 0.3 as 0.30 so both numbers have two decimal places. Add the tenths: 3 + 7 = 10 tenths, which gives 1 whole and 0 tenths left. Carry that 1 to the ones place. Then add the hundredths: 0 + 5 = 5 hundredths. Put it all together and you get 1 in the ones place and 0.05 in the decimal part, so the sum is 1.05. The other options don’t match because they either skip the carry or don’t align the decimal places.

Lining up the decimal points and adding by place value is how you add decimals correctly. Treat 0.3 as 0.30 so both numbers have two decimal places. Add the tenths: 3 + 7 = 10 tenths, which gives 1 whole and 0 tenths left. Carry that 1 to the ones place. Then add the hundredths: 0 + 5 = 5 hundredths. Put it all together and you get 1 in the ones place and 0.05 in the decimal part, so the sum is 1.05. The other options don’t match because they either skip the carry or don’t align the decimal places.