math4childrenplus.com › grades › 1st-grade1st Grade Math Worksheets – Printable PDFs Free | Math 4 ... 1st Grade Math Worksheets – Printable PDFs. 1st grade math worksheets on addition (add one to other numbers, adding double digit numbers, addition with carrying etc), subtraction (subtraction word problems, subtraction of small numbers, subtracting double digits etc), numbers (number lines, ordering numbers, comparing numbers, ordinal numbers etc), telling time (A.M. and P.M., reading time ...