Teacher Settings
Mode: Random
Timer (seconds)
Default: 120
Show countdown Hide to reduce distractions
Auto-clear working space Clear PV canvas when Next is pressed
Sum & Difference — Fill in the Blank
Question format: “The sum of/difference between a and b is _____.”
Score: 0
Streak: 0
Time: 120s
Audio: Locked
Tip: Tap Working to do your working on the PV panel.
Streak journey: bird goes home 0 / 10
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Press Start to begin!
Tip: Type the missing number, then press Submit.
✍️ Working Space (PV) Mouse / finger / stylus • Undo/Redo • Place Value chart
Do your working here.
Size PV
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