Counting Numbers( Week 3 Practice) 1. Please find the missing number in 12, 13, 14, 15, 16, 17, ?, 19, 20, ... 2. What is the natural number comes exactly in the middle between 35 and 39? 4. Please find the missing number in 10, 20, 30, 40, 50, 60, 70, 80, ?, 100, 110, ... 5. Please find the missing number in 24, 34, 44, 54, 64, ?, 84, 94, ... |