คำแนะนำของผู้เขียน
students find 1 more, 1 less, 10 more, and 10 less using a 100s chart
1 more, 1 less, 10 more, 10 less
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คำแนะนำของผู้เขียน
students find 1 more, 1 less, 10 more, and 10 less using a 100s chart
students find 1 more, 1 less, 10 more, and 10 less using a 100s chart
students find 1 more, 1 less, 10 more, and 10 less using a 100s chart