Align decimals and add each place value carefully.

Use placeholders to align decimal places correctly.

Add the whole number part and decimal part separately if needed.

Ensure decimal points are perfectly aligned.

For very small decimals, align all digits carefully.

Work slowly to avoid mistakes with small numbers.

Combine the whole and decimal parts accurately.

Borrow from the whole number if needed.

Adding numbers with many decimal places requires attention to detail.

Focus on subtracting from right to left.

Check the sum by re-adding to verify.

When decimals are very close, subtract carefully.