Adding & Subtracting 10 - 1st Grade Math
Card 1 of 15
What is $10$ more than $70$?
What is $10$ more than $70$?
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$80$. $70 + 10 = 80$ because the tens digit increases from $7$ to $8$.
$80$. $70 + 10 = 80$ because the tens digit increases from $7$ to $8$.
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Identify the number that is $10$ more than $26$.
Identify the number that is $10$ more than $26$.
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$36$. $26 + 10 = 36$ because the tens digit increases from $2$ to $3$.
$36$. $26 + 10 = 36$ because the tens digit increases from $2$ to $3$.
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What is $10$ less than $40$?
What is $10$ less than $40$?
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$30$. $40 - 10 = 30$ because the tens digit decreases from $4$ to $3$.
$30$. $40 - 10 = 30$ because the tens digit decreases from $4$ to $3$.
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What is $10$ more than $40$?
What is $10$ more than $40$?
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$50$. $40 + 10 = 50$ because the tens digit increases from $4$ to $5$.
$50$. $40 + 10 = 50$ because the tens digit increases from $4$ to $5$.
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What is $10$ more than $19$?
What is $10$ more than $19$?
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$29$. $19 + 10 = 29$ because the tens digit increases from $1$ to $2$.
$29$. $19 + 10 = 29$ because the tens digit increases from $1$ to $2$.
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What is $10$ less than $58$?
What is $10$ less than $58$?
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$48$. $58 - 10 = 48$ because the tens digit decreases from $5$ to $4$.
$48$. $58 - 10 = 48$ because the tens digit decreases from $5$ to $4$.
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What is $10$ more than $58$?
What is $10$ more than $58$?
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$68$. $58 + 10 = 68$ because the tens digit increases from $5$ to $6$.
$68$. $58 + 10 = 68$ because the tens digit increases from $5$ to $6$.
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What is $10$ less than $34$?
What is $10$ less than $34$?
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$24$. $34 - 10 = 24$ because the tens digit decreases from $3$ to $2$.
$24$. $34 - 10 = 24$ because the tens digit decreases from $3$ to $2$.
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Which digit changes when you add $10$ to a two-digit number?
Which digit changes when you add $10$ to a two-digit number?
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The tens digit increases by $1$. Adding $10$ adds one group of ten, changing only the tens place.
The tens digit increases by $1$. Adding $10$ adds one group of ten, changing only the tens place.
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Which digit changes when you subtract $10$ from a two-digit number?
Which digit changes when you subtract $10$ from a two-digit number?
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The tens digit decreases by $1$. Removing $10$ takes away one group of ten from the tens place.
The tens digit decreases by $1$. Removing $10$ takes away one group of ten from the tens place.
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What does it mean to find $10$ more than a two-digit number?
What does it mean to find $10$ more than a two-digit number?
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Add $10$ to the number. Adding $10$ increases the value by one ten.
Add $10$ to the number. Adding $10$ increases the value by one ten.
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Identify the number that is $10$ less than $26$.
Identify the number that is $10$ less than $26$.
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$16$. $26 - 10 = 16$ because the tens digit decreases from $2$ to $1$.
$16$. $26 - 10 = 16$ because the tens digit decreases from $2$ to $1$.
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What is $10$ more than $99$?
What is $10$ more than $99$?
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$109$. $99 + 10 = 109$ because we need to regroup into hundreds.
$109$. $99 + 10 = 109$ because we need to regroup into hundreds.
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What is $10$ less than $99$?
What is $10$ less than $99$?
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$89$. $99 - 10 = 89$ because the tens digit decreases from $9$ to $8$.
$89$. $99 - 10 = 89$ because the tens digit decreases from $9$ to $8$.
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What is $10$ more than $90$?
What is $10$ more than $90$?
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$100$. Adding $10$ to $90$ gives $10$ tens or $100$.
$100$. Adding $10$ to $90$ gives $10$ tens or $100$.
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