NF · Three digits

Keep the total in mind

Follow the rapidly displayed numbers, calculate mentally, and enter your answer at the end.

Settings

Training settings Your changes will be saved for future attempts.

Number countPer problem Display speed0.1 to 1.5 1.0 Number of problemsPer training session 2

Number of participants1–4 participants on the same screen

1 2 3 4

ModeNF · Core calculation

Number rangeThree digits

Numbers / problem5

Speed · problems1.0 · 2

Participants1

Focus area

Follow every number

Press Enter to submit your answer

Select “Start calculation”. The numbers will appear one by one, followed by the answer field.

3 Get ready…

Wait for the exercise to begin.

Your answer