Ohio Common Core Standards. You add/subtract/multiply/divide decimals the same way you add/subtract/multiply/divide whole numbers BUT you also need to place the decimal in the correct spot. When multiplying decimals, the decimals may or may NOT be lined up in the multiplication problem.

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Study GuideAdd/Subtract/Multiply/Divide Decimals

Worksheet/Answer keysAdd/Subtract/Multiply/Divide Decimals

Worksheet/Answer keysAdd/Subtract/Multiply/Divide Decimals

Worksheet/Answer keysAdd/Subtract/Multiply/Divide Decimals

Worksheet/Answer keysMultipying & Dividing Decimals

Vocabulary/Answer keysAdd/Subtract/Multiply/Divide Decimals

OH.CC.NBT.5. Number and Operations in Base Ten

Perform operations with multi-digit whole numbers and with decimals to hundredths.

NBT.5.7. Add, subtract, multiply, and divide decimals to hundredths, using concrete models or 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.

Understand the place value system.

NBT.5.1. 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.

NBT.5.3. Read, write, and compare decimals to thousandths.

NBT.5.3(a) Read and write decimals to thousandths using base-ten numerals, number names, and expanded form, e.g., 347.92 = 3 x 100 + 4 x 10 + 7 x 1 + 3 x (1/10) + 9 x (1/100) + 2 x (1/1000).