Multiply one-digit numbers with up to two decimal places by whole numbers

What this means, in plain words

A decimal writes parts of a whole using the places after the point: tenths, then hundredths, then thousandths.

A digit is one of the ten symbols, 0 to 9, that all numbers are written with.

Multiplication is repeated addition of equal groups. Division shares a total into equal groups, or works out how many groups fit.