A cricket scorer keeps one total and adds each run as it comes. You can add a list of 2-digit numbers the same way: hold the total in your head, add the tens of the next number, then its ones.
Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
🏁 Lesson 5 test
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass — and beat the clock: finish within 4 min.
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🏏 Run-Rate Ranger badge when you pass — and a certificate when you finish all 5 lessons of
Part 1 · Speed adding & subtracting. You can still take the test without signing in.
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