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Published byTyshawn Friar Modified over 2 years ago

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Look at these sequences. What is happening? 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 10, 20, 30, 40, 50, 60, 70, 80, 90, , 200, 300, 400, 500, 600, 700, 800, 900, 1000

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Counting on in tens. Counting on in tens means adding ten on to the previous number in the sequence. Practice: 10, 20, 30, …, …, …, …, …, …, …, …, Now try starting at , 110, …., ….., ….., ….., …..,

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Counting back in tens. Counting back in tens means taking ten away from the previous number in the sequence. Try it: 100, 90, ….., ….., ….., ….., Now try to complete this sequence. Can you fill in the gaps? 120, ….., 100, ……, ……, 70

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Counting on and back in hundreds. Counting on and back in hundreds is similar to the tens but this time you use hundreds instead. Counting on: 100, 200, 300, 400, 500 Counting back: 500, 400, 300, 200, 100

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Look carefully at this sequence! What changes in this sequence? 256, 356, 456, 556, 656, 756, 856, 956 What stays the same?

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Look at these sequences. Discuss with your friend what is happening in each one. 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, , 132, 142, 152, 162, 172, , 521, 621, 721, 821, 921, 1021

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