Identify Odd and Even Numbers - 2nd Grade Math
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What equation shows $12$ as a sum of two equal addends?
What equation shows $12$ as a sum of two equal addends?
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$12=6+6$. Half of $12$ is $6$, so $12=6+6$.
$12=6+6$. Half of $12$ is $6$, so $12=6+6$.
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What equation shows $16$ as a sum of two equal addends?
What equation shows $16$ as a sum of two equal addends?
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$16=8+8$. Half of $16$ is $8$, so $16=8+8$.
$16=8+8$. Half of $16$ is $8$, so $16=8+8$.
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What equation shows $4$ as a sum of two equal addends?
What equation shows $4$ as a sum of two equal addends?
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$4=2+2$. Half of $4$ is $2$, so $4=2+2$.
$4=2+2$. Half of $4$ is $2$, so $4=2+2$.
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Choose the equation that shows an even number as two equal addends: $9=4+5$ or $14=7+7$?
Choose the equation that shows an even number as two equal addends: $9=4+5$ or $14=7+7$?
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$14=7+7$. $14=7+7$ shows two equal addends; $9=4+5$ does not.
$14=7+7$. $14=7+7$ shows two equal addends; $9=4+5$ does not.
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Which numbers from $1$ to $20$ are even?
Which numbers from $1$ to $20$ are even?
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$2,4,6,8,10,12,14,16,18,20$. These are all multiples of $2$ up to $20$.
$2,4,6,8,10,12,14,16,18,20$. These are all multiples of $2$ up to $20$.
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What does it mean for a number to be even?
What does it mean for a number to be even?
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It can be split into $2$ equal groups with no leftovers. Even numbers divide evenly by $2$ with no remainder.
It can be split into $2$ equal groups with no leftovers. Even numbers divide evenly by $2$ with no remainder.
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Find and correct the mistake: A student says $8=3+5$ shows two equal addends.
Find and correct the mistake: A student says $8=3+5$ shows two equal addends.
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Correct: $8=4+4$. $3$ and $5$ are not equal; equal addends would be $4+4$.
Correct: $8=4+4$. $3$ and $5$ are not equal; equal addends would be $4+4$.
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If you pair $15$ objects into groups of $2$, how many objects are left unpaired?
If you pair $15$ objects into groups of $2$, how many objects are left unpaired?
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$1$ object is left unpaired. $15÷2=7$ remainder $1$, so $1$ object remains unpaired.
$1$ object is left unpaired. $15÷2=7$ remainder $1$, so $1$ object remains unpaired.
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What does it mean for a number to be odd?
What does it mean for a number to be odd?
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It cannot be split into $2$ equal groups; $1$ is left over. Odd numbers have a remainder of $1$ when divided by $2$.
It cannot be split into $2$ equal groups; $1$ is left over. Odd numbers have a remainder of $1$ when divided by $2$.
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Identify whether $20$ is odd or even.
Identify whether $20$ is odd or even.
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$20$ is even. It ends in $0$, which makes it even.
$20$ is even. It ends in $0$, which makes it even.
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Identify whether $1$ is odd or even.
Identify whether $1$ is odd or even.
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$1$ is odd. It ends in $1$, which makes it odd.
$1$ is odd. It ends in $1$, which makes it odd.
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Which option shows counting by $2$s up to $12$ correctly?
Which option shows counting by $2$s up to $12$ correctly?
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$2,4,6,8,10,12$. Starting at $2$, add $2$ each time to count by $2$s.
$2,4,6,8,10,12$. Starting at $2$, add $2$ each time to count by $2$s.
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What is the missing number: $2,4,6,_,10$?
What is the missing number: $2,4,6,_,10$?
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$8$. When counting by $2$s: $6+2=8$.
$8$. When counting by $2$s: $6+2=8$.
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Identify whether $18$ is odd or even.
Identify whether $18$ is odd or even.
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$18$ is even. It ends in $8$, which makes it even.
$18$ is even. It ends in $8$, which makes it even.
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Identify whether $13$ is odd or even.
Identify whether $13$ is odd or even.
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$13$ is odd. It ends in $3$, which makes it odd.
$13$ is odd. It ends in $3$, which makes it odd.
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