Grade 5 Unit 2:
Adding and Subtracting Decimals
Unit 2 Parent Letter
Read, Write, & Compare Decimals to Thousandths
MGSE5.NBT.3 Read, write, and compare decimals to thousandths.
a. Read and write decimals to thousandths using baseten 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).
b. Compare two decimals to thousandths based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.
Study Island: 3b. Representations of Decimals, 3c. Comparing Decimals
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Round Decimals
MGSE5.NBT.4 Use place value understanding to round decimals up to the hundredths place.
Study Island: 3d. Rounding Decimals
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Review Decimal Place Value
MGSE5.NBT.1 Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
Study Island: 3a. Powers of Ten
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Add & Subtract Decimals
MGSE5.NBT.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models, drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Multiplying and dividing decimals will be taught in Unit 3.
Study Island: 3g. Add and Subtract Decimals
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