Question

estimate 13.434 + 7.54 by first rounding each number to the nearest tenth.

Explanation:

Step1: Round 13.434 to nearest tenth

Look at the hundredths place (3 < 5), so round down: $13.434 \approx 13.4$

Step2: Round 7.54 to nearest tenth

Look at the hundredths place (4 < 5), so round down: $7.54 \approx 7.5$

Step3: Add the rounded numbers

$13.4 + 7.5 = 20.9$

Answer:

20.9