Place Value Worksheet: Tens and Ones | K5 Learning These grade 1 math worksheets ask students to break 2-digit numbers (1-99) into the corresponding number of "tens" and "ones"; the emphasis is on understanding of our base ten number system. Worksheet #1 Worksheet #2 Worksheet #3 Worksheet #4 Worksheet #5 Worksheet #6 Similar: Combining tens and ones Identify a digit's place value What is K5?