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Unlock harder levels by getting an average of 80% or higher.

Earn up to 5 stars for each level

The more questions you answer correctly, the more stars you'll unlock!

Each game has 10 questions.

Green box means correct.

Yellow box means incorrect.

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Grade 5 - Number

Standard 5.N.11 - Solve addition and subtraction word problems with decimals.

Included Skills:

Demonstrate an understanding of addition and subtraction of decimals (to thousandths), concretely, pictorially, and symbolically, by

• using personal strategies

• using the standard algorithms

• using estimation

• solving problems

• Estimate a sum or difference using front-end estimation (e.g., for 6.3 + 0.25 + 306.158, think 6 + 306, so the sum is greater than 312) and place the decimal in the appropriate place.

• Correct errors of decimal point placements in sums and differences without using paper and pencil.

• Explain why keeping track of place value positions is important when adding and subtracting decimals.

• Predict sums and differences of decimals using estimation strategies.

• Solve a problem that involves addition and subtraction of decimals, to thousandths.

• Model and explain the relationship that exists between an algorithm, place value, and number properties.

• Determine the sum and difference using the standard algorithms of vertical addition and subtraction. (Numbers are arranged vertically with corresponding place value digits aligned.)

• Refine personal strategies, such as mental math, to increase efficiency when appropriate (e.g., 3.36 + 9.65 think, 0.35 + 0.65 = 1.00, therefore, 0.36 + 0.65 = 1.01 and 3 + 9 = 12 for a total of 13.01)

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