Missing Numbers 1
Description This activity requires students to enter the missing numbers in the
“broken” number grid. The visualisation encourages them to apply reasoning skills by
counting on in ones or tens from the numbers nearest the answer boxes.
Teaching Hints Use the visualisation to compare different methods of finding
one answer. Students could use grid paper to make their own broken grids then swap with a
partner to write some clues and then swap again to solve. Depending on ability, students
could be further challenged to create these within a certain range of numbers, for example 5
digit numbers.
Activities
Easy Example
Correct Medium Example
Incorrect Hard Example