Doris weighs 38 pounds. Janet weighs 7 pounds. How much heavier is Doris than Janet?

Doris is 31 pounds heavier than Janet. You can find this by simply subtracting Janet's weight from Doris's weight: 38 pounds - 7 pounds = 31 pounds. It's like comparing two cakes at a birthday party—Doris has a much bigger slice! When you're dealing with subtraction, a common mistake is forgetting to pay attention to the units involved (like pounds in this case). Always confirm you're subtracting the same units to avoid any confusing mix-ups. It’s like trying to mix apples and oranges—stick to what you know!