Representing Numbers – Decimals (Tenths and Hundredths) using Hundred Grids . Whole numbers are formed by progressively making Ones into groups of Ten, then Tens into groups of 10 Tens (Hundreds) etc. Decimals are formed by progressively partitioning Ones into 10 equal parts, then each Tenth into 10 equal parts (Hundredths) etc. . While Hundreds are larger than Tens and Ones in whole numbers because of the progressive grouping, Hundredths are smaller than Tenths and Ones in decimals because of t