← Back to the lesson: Calculator: when yes, when no

Practice: Calculator: when yes, when no

All the questions sit under each other, like on paper. Where you can tap (signs, yes/no, shapes), tap — do not hunt for a keyboard. Otherwise write the answer and press the tick, or Check all at the bottom. Green = right. Red = not yet. Bắt đầu with ten. When it goes well, add more.

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