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This is Finn the Math Fish.   Finn 

loves to swim in the deep blue 

sea.   Sometimes, he even comes 

across math problems!   Whenever 

he finds a math problem, he 

always tries to solve it.

2+2=?

5+3=?

One day, Finn was swimming along when 

he found some addition problems.   He 

loved addition!   It didn't take him long 

to solve these problems.   All he had to 

do was put the numbers together and he 

got his "sum", or the answer to the 

problem.

2+2=4

5+3=8

So, that's what Finn did.   He put the 

numbers together to get an even 

bigger number, which is the answer to 

his problem.

8-5=?

4-3=?

6-6=?

After Finn solved the addition problems, 

he swam through the deep blue sea some 

more.   Then, Finn came across some 

subtraction problems!   He knew what to 

do with these problems as well, because 

subtraction is the opposite of addition.  

Instead of getting a bigger number, you 

count down and get a smaller number.  

8-5=3

4-3=1

6-6=0

So, Finn took the second number and counted 

down from the first number to get the 

"difference" between the two numbers, 

which was his answer.   With 8-5, Finn counted 

down 5 numbers from 8.   "7, 6, 5, 4... 3!," he 

shouted as he got his "difference" between 

the two numbers, which was his answer.  

After Finn solved all the problems, he swam 

away happily.

Finn was swimming along again when he 

found a rocky island with multiplication 

problems! Uh oh, Finn didn't know how to 

do multiplication very well.   He needed 

his friend Reef to help him out.   "Oh, 

Reef!," he called, "Can you help me with 

these problems?"

"Of course!," Reef said excitedly as he swam 

over to Finn.   He explained to Finn that when 

you multiply numbers, you add the first 

number by itself as many times as the second 

number shows.   So, 3 times 2 would be 3 plus 

3 and 2x4 would be 2+2+2+2.   The answer to 

a multiplication problem is called the 

"product".

"So, what would 1x5 equal?," Reef asked Finn.

"Let's see...," Finn thought. "1x5 is the same 

thing as 1+1+1+1+1... 1+1 equals 2, 2+1 equals 3, 

3+1 equals 4, and 4+1 equals 5! So, the answer's 

5!"

"That's right!" said Reef, cheerfully. "An 

easier way to do these kinds of problem is if 

any number is multiplied by 1, then that 

number equals itself."   Finn thanked his friend 

and they swam together, further exploring the 

deep blue sea.

As Finn was getting towards the end of 

his journey with Reef, they stumbled 

upon an old sunken ship with division 

problems near the bow, or the front.   "I 

don't know how to do division, either," 

said Finn, confused.

"It's okay! Division can get really tricky. 

I'll explain this, too!" said Reef.

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