Operations - 2nd Grade Math
Card 0 of 3
Solve:
Solve:
When subtracting any number by 
the only number that will change in your answer is the hundreds place.
When subtracting any number by
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The pet store has 
goldfish in a tank. A teacher bought 
goldfish for her school’s fish tank. How many goldfish does the pet store have left?
The pet store has
This is a subtraction problem because we want to know how many goldfish the pet store has left over after the teacher buys the first and takes them away from the store. We take the number of goldfish that the store had and then subtract the number that the teacher bought.
This is a subtraction problem because we want to know how many goldfish the pet store has left over after the teacher buys the first and takes them away from the store. We take the number of goldfish that the store had and then subtract the number that the teacher bought.
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David is 
taller than Alison. Alison is 
tall. How tall is David?
David is
This is an addition problem because we have the difference in height from the question. Alison is 
inches tall and David is 
inches taller than her, 
is our difference. We can add our difference to Alison's height to find out how tall David is.
This is an addition problem because we have the difference in height from the question. Alison is
Compare your answer with the correct one above