A basket of potatoes is put on the kitchen scale. The empty basket weighs 0.8 kg. What is the mass of the potatoes alone?

Comparing decimals is just comparing place values left-to-right. To make it easy, give both numbers the **same number of decimal places** by adding zeros on the right (which never changes the value). Compare 1.4 and 1.42: rewrite 1.4 as 1.40. Now compare digit-by-digit — 1.40 vs 1.42 → at the hundredths place, 0 < 2 → 1.4 < 1.42.