Decimal OperationsATI TEAS 7 cheat sheet

Line up, or count places

10 key facts 5 practice questions Reviewed Oct 2026

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Add & Subtract

Line up the decimal points, then add or subtract normally
Fill empty places with zeros as placeholders
3.2 + 4.75 → 3.20 + 4.75 = 7.95

Multiply

Ignore the decimals, multiply as whole numbers
Count total decimal places in both factors
Place that many in the answer: 0.3 × 0.04 = 0.012

Divide

Move the divisor's decimal to make it whole
Move the dividend's decimal the same number of places
Then divide normally

Check

Estimate first — 0.3 × 0.04 should be small, not 1.2

Key takeaway

Line up, or count places

Before you read

Test yourself first: 5 questions

Question 1 of 5

Convert 45% to a decimal.

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