Add and Subtract Within 1000 - 2nd Grade Math
Card 1 of 15
Which property is shown by $(120 + 80) + 5 = 120 + (80 + 5)$?
Which property is shown by $(120 + 80) + 5 = 120 + (80 + 5)$?
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Associative property of addition. Grouping doesn't change the sum.
Associative property of addition. Grouping doesn't change the sum.
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What is the value of $5$ hundreds $+\ 12$ tens $+\ 9$ ones?
What is the value of $5$ hundreds $+\ 12$ tens $+\ 9$ ones?
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$629$. $500 + 120 + 9 = 629$ after regrouping tens.
$629$. $500 + 120 + 9 = 629$ after regrouping tens.
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Which property is shown by $246 + 300 = 300 + 246$?
Which property is shown by $246 + 300 = 300 + 246$?
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Commutative property of addition. Order doesn't matter when adding numbers.
Commutative property of addition. Order doesn't matter when adding numbers.
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What is the missing number in $538 + \square = 900$?
What is the missing number in $538 + \square = 900$?
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$362$. $900 - 538 = 362$ to find the missing addend.
$362$. $900 - 538 = 362$ to find the missing addend.
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What is $701 - 356$?
What is $701 - 356$?
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$345$. $701 - 356 = 345$ with borrowing from hundreds.
$345$. $701 - 356 = 345$ with borrowing from hundreds.
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What is $900 - 458$?
What is $900 - 458$?
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$442$. $900 - 458 = 442$ with borrowing from hundreds and tens.
$442$. $900 - 458 = 442$ with borrowing from hundreds and tens.
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What is $805 - 467$?
What is $805 - 467$?
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$338$. $805 - 467 = 338$ with borrowing from tens and hundreds.
$338$. $805 - 467 = 338$ with borrowing from tens and hundreds.
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What is $742 - 318$?
What is $742 - 318$?
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$424$. $742 - 318 = 424$ with borrowing from tens.
$424$. $742 - 318 = 424$ with borrowing from tens.
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What is $275 + 489$?
What is $275 + 489$?
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$764$. $275 + 489 = 764$ with regrouping ones.
$764$. $275 + 489 = 764$ with regrouping ones.
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What is $596 + 208$?
What is $596 + 208$?
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$804$. $596 + 208 = 804$ with regrouping ones.
$804$. $596 + 208 = 804$ with regrouping ones.
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What is $468 + 357$?
What is $468 + 357$?
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$825$. $468 + 357 = 825$ with regrouping ones and tens.
$825$. $468 + 357 = 825$ with regrouping ones and tens.
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What is $384 + 215$?
What is $384 + 215$?
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$599$. $384 + 215 = 599$ by adding place values.
$599$. $384 + 215 = 599$ by adding place values.
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What does it mean to decompose a hundred when subtracting within $1000$?
What does it mean to decompose a hundred when subtracting within $1000$?
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Trade $1$ hundred for $10$ tens. Borrowing when not enough tens to subtract.
Trade $1$ hundred for $10$ tens. Borrowing when not enough tens to subtract.
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What does it mean to decompose a ten when subtracting within $1000$?
What does it mean to decompose a ten when subtracting within $1000$?
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Trade $1$ ten for $10$ ones. Borrowing when not enough ones to subtract.
Trade $1$ ten for $10$ ones. Borrowing when not enough ones to subtract.
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What does it mean to compose a hundred when adding within $1000$?
What does it mean to compose a hundred when adding within $1000$?
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Trade $10$ tens for $1$ hundred. Regrouping when tens sum to 10 or more.
Trade $10$ tens for $1$ hundred. Regrouping when tens sum to 10 or more.
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