Using only these keys on your calculator make each of the target numbers on the balloons. Use the minimum number of key presses.
16
24
97
624
Brilliant Balloon Busting!
Is it possible to do it using fewer than key presses?
Topics: Starter  Arithmetic  Calculator  Place Value  Problem Solving
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Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=September28
Here is the URL which will take them to a calculator workout.