1st Grade Math Flashcards: Subtract Multiples Of 10

What this deck covers

This deck focuses on Subtract Multiples Of 10, giving you a quick way to review the definitions, rules, and examples that matter most for 1st Grade Math.

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 the value of $20 - 10$?

Answer: $10$. Subtract the tens digits: $2 - 1 = 1$, so $20 - 10 = 10$.

Flashcard 2: What is the missing number in $90 - \square = 0$?

Answer: $90$. Find what subtracted from $90$ gives $0$.

Flashcard 3: What is $70 - 50$?

Answer: $20$. $7$ tens minus $5$ tens equals $2$ tens.

Flashcard 4: What is the result of $20 - 90$?

Answer: Not allowed here; the difference must be positive or $0$. Cannot subtract a larger number from a smaller one in this skill.

Flashcard 5: What is $50 - 10$?

Answer: $40$. $5$ tens minus $1$ ten equals $4$ tens.

Flashcard 6: What is the value of $50 - 20$?

Answer: $30$. Subtract the tens digits: $5 - 2 = 3$, so $50 - 20 = 30$.

Flashcard 7: What is $80 - 60$?

Answer: $20$. $8$ tens minus $6$ tens equals $2$ tens.

Flashcard 8: What is the value of $30 - 30$?

Answer: $0$. Any number minus itself equals zero.

Flashcard 9: What is the value of $80 - 50$?

Answer: $30$. Subtract the tens digits: $8 - 5 = 3$, so $80 - 50 = 30$.

Flashcard 10: What is $90 - 10$?

Answer: $80$. $9$ tens minus $1$ ten equals $8$ tens.

Flashcard 11: What is the value of $80 - 70$?

Answer: $10$. Subtract the tens digits: $8 - 7 = 1$, so $80 - 70 = 10$.

Flashcard 12: What is the result of $70 - 70$?

Answer: $0$. Any number minus itself equals zero.

Flashcard 13: What is $20 - 10$?

Answer: $10$. $2$ tens minus $1$ ten equals $1$ ten.

Flashcard 14: What is the result of $70 - 30$?

Answer: $40$. Subtract the tens: $7$ tens minus $3$ tens equals $4$ tens.

Flashcard 15: What is the missing number in $\square - 30 = 40$?

Answer: $70$. Find what number minus $30$ equals $40$.

Flashcard 16: What is the value of $80 - 20$?

Answer: $60$. Subtract the tens digits: $8 - 2 = 6$, so $80 - 20 = 60$.

Flashcard 17: What is the value of $60 - 10$?

Answer: $50$. Subtract the tens digits: $6 - 1 = 5$, so $60 - 10 = 50$.

Flashcard 18: What is the result of $90 - 80$?

Answer: $10$. Subtract the tens: $9$ tens minus $8$ tens equals $1$ ten.

Flashcard 19: What is the value of $70 - 30$?

Answer: $40$. Subtract the tens digits: $7 - 3 = 4$, so $70 - 30 = 40$.

Flashcard 20: What is $40 - 10$?

Answer: $30$. $4$ tens minus $1$ ten equals $3$ tens.

Flashcard 21: What is the value of $90 - 80$?

Answer: $10$. Subtract the tens digits: $9 - 8 = 1$, so $90 - 80 = 10$.

Flashcard 22: What is the result of $80 - 10$?

Answer: $70$. Subtract the tens: $8$ tens minus $1$ ten equals $7$ tens.

Flashcard 23: What is the value of $60 - 50$?

Answer: $10$. Subtract the tens digits: $6 - 5 = 1$, so $60 - 50 = 10$.

Flashcard 24: What is the value of $90 - 30$?

Answer: $60$. Subtract the tens digits: $9 - 3 = 6$, so $90 - 30 = 60$.

Flashcard 25: What is the result of $90 - 50$?

Answer: $40$. Subtract the tens: $9$ tens minus $5$ tens equals $4$ tens.

Flashcard 26: What is the value of $90 - 50$?

Answer: $40$. Subtract the tens digits: $9 - 5 = 4$, so $90 - 50 = 40$.

Flashcard 27: What is the value of $40 - 10$?

Answer: $30$. Subtract the tens digits: $4 - 1 = 3$, so $40 - 10 = 30$.

Flashcard 28: What is $90 - 90$?

Answer: $0$. Any number minus itself equals zero.

Flashcard 29: What is the result of $80 - 60$?

Answer: $20$. Subtract the tens: $8$ tens minus $6$ tens equals $2$ tens.

Flashcard 30: What is the value of $70 - 20$?

Answer: $50$. Subtract the tens digits: $7 - 2 = 5$, so $70 - 20 = 50$.

Flashcard 31: What is the missing number in $50 - \square = 20$?

Answer: $30$. Find what number subtracted from $50$ gives $20$.

Flashcard 32: What is $90 - 40$?

Answer: $50$. $9$ tens minus $4$ tens equals $5$ tens.

Flashcard 33: What does it mean to subtract $30$ from $80$ using tens (place value)?

Answer: Subtract $3$ tens from $8$ tens. Think of it as taking away groups of ten.

Flashcard 34: What does the tens digit tell you in a multiple of $10$ such as $70$?

Answer: It tells the number of tens: $70$ is $7$ tens. The tens place shows how many groups of ten make up the number.

Flashcard 35: What does the digit $7$ mean in the number $70$ when using tens?

Answer: $70$ means $7$ tens. In place value, the digit shows how many groups of ten.

Flashcard 36: What is the value of $50 - 40$?

Answer: $10$. Subtract the tens digits: $5 - 4 = 1$, so $50 - 40 = 10$.

Flashcard 37: What is $50 - 40$?

Answer: $10$. $5$ tens minus $4$ tens equals $1$ ten.

Flashcard 38: What is the result of $90 - 10$?

Answer: $80$. Subtract the tens: $9$ tens minus $1$ ten equals $8$ tens.

Flashcard 39: What is the result of $30 - 10$?

Answer: $20$. Subtract the tens: $3$ tens minus $1$ ten equals $2$ tens.

Flashcard 40: What is the value of $1$ ten when subtracting multiples of $10$?

Answer: $1$ ten equals $10$. Each ten represents a group of $10$ ones.

Flashcard 41: What is the result of $100 - 20$?

Answer: Not allowed here; both numbers must be from $10$ to $90$. $100$ exceeds the allowed range of $10-90$.

Flashcard 42: What is $80 - 30$?

Answer: $50$. $8$ tens minus $3$ tens equals $5$ tens.

Flashcard 43: What is the result of $50 - 20$?

Answer: $30$. Subtract the tens: $5$ tens minus $2$ tens equals $3$ tens.

Flashcard 44: What is the result of $30 - 20$?

Answer: $10$. Subtract the tens: $3$ tens minus $2$ tens equals $1$ ten.

Flashcard 45: What is the value of $70 - 60$?

Answer: $10$. Subtract the tens digits: $7 - 6 = 1$, so $70 - 60 = 10$.

Flashcard 46: What is $70 - 70$?

Answer: $0$. Any number minus itself equals zero.

Flashcard 47: Which addition fact checks the subtraction $80 - 30 = 50$?

Answer: $50 + 30 = 80$. Addition and subtraction are inverse operations.

Flashcard 48: What is $40 - 40$?

Answer: $0$. Any number minus itself equals zero.

Flashcard 49: What addition fact can you use to check $80 - 30 = 50$?

Answer: $50 + 30 = 80$. Addition and subtraction are inverse operations.

Flashcard 50: What is the value of $90 - 70$?

Answer: $20$. Subtract the tens digits: $9 - 7 = 2$, so $90 - 70 = 20$.

Flashcard 51: What is $60 - 20$?

Answer: $40$. $6$ tens minus $2$ tens equals $4$ tens.

Flashcard 52: What is the value of $40 - 20$?

Answer: $20$. Subtract the tens digits: $4 - 2 = 2$, so $40 - 20 = 20$.

Flashcard 53: What is $60 - 50$?

Answer: $10$. $6$ tens minus $5$ tens equals $1$ ten.

Flashcard 54: What is $30 - 20$?

Answer: $10$. $3$ tens minus $2$ tens equals $1$ ten.

Flashcard 55: What is the value of $60 - 40$?

Answer: $20$. Subtract the tens digits: $6 - 4 = 2$, so $60 - 40 = 20$.

Flashcard 56: What is the result of $60 - 20$?

Answer: $40$. Subtract the tens: $6$ tens minus $2$ tens equals $4$ tens.

Flashcard 57: What is the result of $40 - 40$?

Answer: $0$. Any number minus itself equals zero.

Flashcard 58: What is the value of $90 - 10$?

Answer: $80$. Subtract the tens digits: $9 - 1 = 8$, so $90 - 10 = 80$.