Rhode Island 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

WorksheetAdd/Subtract/Multiply/Divide Decimals

WorksheetAdd/Subtract/Multiply/Divide Decimals

WorksheetAdd/Subtract/Multiply/Divide Decimals

WorksheetMultipying & Dividing Decimals

VocabularyAdd/Subtract/Multiply/Divide Decimals

RI.M:N&O:5. NECAP - Grade Level Expectation: Number and Operation.

M:N&O:5:1. Demonstrates conceptual understanding of rational numbers with respect to whole numbers from 0 to 9,999,999 through equivalency, composition, decomposition, or place value using models, explanations, or other representations; and positive fractional numbers (proper, mixed number, and improper) (halves, fourths, eighths, thirds, sixths, twelfths, fifths, or powers of ten (10, 100, 1000)), decimals (to thousandths), or benchmark percents (10%, 25%, 50%, 75% or 100%) as a part to whole relationship in area, set, or linear models using models, explanations, or other representations. (State)

M:N&O:5:3. Demonstrates conceptual understanding of mathematical operations by adding and subtracting decimals and positive proper fractions with unlike denominators.

M:N&O:5:4. Accurately solves problems involving multiple operations on whole numbers or the use of the properties of factors, multiples, prime, or composite numbers; and addition or subtraction of fractions (proper) and decimals to the hundredths place. (Division of whole numbers by up to a two-digit divisor.) (State)