Are you looking for a reusable decimal reasoning activity that challenges students to apply their understanding of place value to identify an unknown decimal?
Students read a set of clue cards and cross off decimals on the grid that don't match each clue, working through the constraints until one decimal remains — that's the mystery decimal. They record their answer, then wipe the grid clean and repeat with the next set. The activity requires students to think carefully about place value in tenths and hundredths, comparing and eliminating values using mathematical language like "not less than," "not greater than," and "does not have a digit greater than."
What's included:
6 colour versions of the mystery decimal grid mat (same 27 decimals on each, ranging from 0.06 to 2.0)
12 sets of clue cards, each with 4 clues leading to a unique mystery decimal
Recording sheet for students to record their answer for each of the 12 sets
Answer keys included