ISEE Lower Level Mathematics Achievement Flashcards: Decimal Addition Subtraction

What this deck covers

This deck focuses on Decimal Addition Subtraction, giving you a quick way to review the definitions, rules, and examples that matter most for ISEE Lower Level Mathematics Achievement.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: What is $0.8 - 0.125$?

Answer: $0.675$. Align decimals: $0.800 - 0.125$; subtract thousandths with borrowing to get $0.675$.

Flashcard 2: What is $100.0 - 0.75$?

Answer: $99.25$. Align decimals: $100.00 - 0.75$; subtract hundredths with borrowing from units for $99.25$.

Flashcard 3: What is $1.01 - 0.99$?

Answer: $0.02$. Align decimals: $1.01 - 0.99$; subtract hundredths with borrowing for $0.02$.

Flashcard 4: What is $4.305 + 0.07$?

Answer: $4.375$. Align decimals: $4.305 + 0.070$; add thousandths, resulting in a carryover to hundredths for $4.375$.

Flashcard 5: What is $1.2 - 0.35$?

Answer: $0.85$. Align decimals: $1.20 - 0.35$; subtract with borrowing in the hundredths place for $0.85$.

Flashcard 6: What is $0.500 - 0.275$?

Answer: $0.225$. Align decimals: $0.500 - 0.275$; subtract thousandths first, borrowing as needed for $0.225$.

Flashcard 7: What is $8.06 + 0.9$?

Answer: $8.96$. Align decimals: $8.06 + 0.90$; add columns from right to left to get $8.96$.

Flashcard 8: What is $0.001 + 0.010$?

Answer: $0.011$. Align decimals: $0.001 + 0.010$; add thousandths and hundredths to obtain $0.011$.

Flashcard 9: Find the value of $0.06 + 0.06 + 0.06$.

Answer: $0.18$. Add hundredths: three $0.06$ values align and sum to $0.18$ with carrying.

Flashcard 10: What is $10.2 - 3.85$?

Answer: $6.35$. Align decimals: $10.20 - 3.85$; subtract column by column with borrowing to obtain $6.35$.

Flashcard 11: What is $6.1 - 2.009$?

Answer: $4.091$. Align decimals: $6.100 - 2.009$; subtract with borrowing across places to get $4.091$.

Flashcard 12: What is $7.5 - 7.5$?

Answer: $0$. Align decimals: $7.5 - 7.5$; subtracting identical values results in zero.

Flashcard 13: What is $3.000 - 0.999$?

Answer: $2.001$. Align decimals: $3.000 - 0.999$; subtract thousandths with borrowing from units to yield $2.001$.

Flashcard 14: What is $2.48 + 0.52$?

Answer: $3.00$. Align decimals: $2.48 + 0.52$; add hundredths and tenths, carrying to units for $3.00$.

Flashcard 15: What is $0.7 + 0.08$?

Answer: $0.78$. Align decimals: $0.70 + 0.08$; add tenths and hundredths separately to reach $0.78$.

Flashcard 16: Identify the first step to subtract decimals accurately in vertical form.

Answer: Write numbers so the decimal points are aligned. Aligning decimal points vertically ensures corresponding place values are matched for accurate borrowing and subtraction.

Flashcard 17: What is $0.04 + 0.009$?

Answer: $0.049$. Align decimals: $0.040 + 0.009$; add thousandths, carrying to hundredths for $0.049$.

Flashcard 18: What is $3.7 + 2.45$?

Answer: $6.15$. Align decimals: $3.70 + 2.45$; add from right, resulting in $6.15$ after carrying over where needed.

Flashcard 19: What is $12.34 + 0.006$?

Answer: $12.346$. Align decimals: $12.340 + 0.006$; add thousandths to obtain $12.346$.

Flashcard 20: State the rule for aligning place values when adding or subtracting decimals.

Answer: Line up decimal points; add or subtract by columns. Aligning decimal points ensures that digits in the same place values (units, tenths, hundredths, etc.) are added or subtracted correctly.

Flashcard 21: What is the rule for adding zeros to decimals before adding or subtracting?

Answer: You may append trailing zeros to match decimal places. Appending trailing zeros equalizes the number of decimal places, allowing proper alignment and accurate column-wise addition or subtraction.

Flashcard 22: What is $9.999 + 0.001$?

Answer: $10.000$. Align decimals: $9.999 + 0.001$; add thousandths, carrying over to units for $10.000$.

Flashcard 23: What is $15.08 - 9.7$?

Answer: $5.38$. Align decimals: $15.08 - 9.70$; subtract with borrowing in tenths and units for $5.38$.

Flashcard 24: What is $5.00 - 2.38$?

Answer: $2.62$. Align decimals: $5.00 - 2.38$; subtract with borrowing from the units place to yield $2.62$.

Flashcard 25: What is $0.3 + 0.3 + 0.3$?

Answer: $0.9$. Add tenths: three instances of $0.3$ sum to $0.9$ by aligning and adding.