•Understand the place value system from thousandths to one million. - Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.392 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000).
•Read, write and compare decimals to thousandths. - Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.
•Use place value understanding to round decimals to any place.
•Add and subtract decimals to hundredths.
•Explain the relationship between concrete models, drawings, and written representations.