1) The document discusses ordering decimals from least to greatest using place value and number lines. It provides examples of ordering prices from a McDonald's menu and test scores. 2) Equivalent decimals have the same value even if they have a different number of decimal places. Annexing zeros by adding trailing zeros does not change a decimal's value. 3) To order decimals from least to greatest, decimals are first lined up and zeros are annexed to give each number the same number of decimal places. Then the decimals are compared using place value starting from the left.