mentalmath
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Practise
Unlimited, untimed if you want it, and it never counts against your daily run.
Difficulty
Warm up
Easy
Medium
Hard
Expert
Problems
10
25
50
Operation
+
Addition
2-digit + 1-digit
−
Subtraction
2-digit − 1-digit
×
Multiplication
2-digit × 1-digit
÷
Division
2–3-digit ÷ 1-digit