Algebra is the branch of mathematics concerning the study of the rules of operations and relations, and the constructions and concepts arising from them, including terms, polynomials, equations and algebraic structures. Together with geometry, analysis, topology, combinatory, and number theory, algebra is one of the main branches of pure mathematics.

**2nd grade math - Addition problem:**

There are 12 boxes in the store. We bought 10 more boxes for the store. How many boxes are there in the store now?

**Solution:**

In 12 boxes in the store

And then we bought 10 boxes in the store

12 + 10 = 22

Therefore 22 boxes in the store now.

**2nd grade math -Subtraction problem:**

A vegetable seller had 15 onions. He sold 6 onions. How many onions did he have left?

**Solution:**

The total amount of vegetables = 15 onions.

Sold onions = 6

Remaining onions =?

So, 15 – 6 = 31

He had 9 onions left.

**2nd grade math - Multiplication problem:**

There are 5 apples in each box. How many are there in 4 boxes?

**Solution:**

So, 5 × 4 = 20

There are 20 apples in 4 boxes.

**2nd grade math - Division problem:**

Peter bought a sack of 18 kg of flour. He has packed the flour equally into the 3 bags. How many kilograms of flour were there in each bag?

**Solution:**

18 ÷ 3 = 6

There were 6 kg of flour in each bag.

**1.**There are 10 boxes in the store. We bought 7 more boxes for the store. How many boxes are there in the store now?

**[Answer: 3]**

**2.** A fruit seller had 10 bananas. He sold 2 bananas. How many bananas did he have left?

**[Answer: 8]**

**3. **There are 4 oranges in each box. How many are there in 2 boxes?

**[Answer: 8]**

**4.** Jhon bought a sack of 20 kg of flour. He has packed the flour equally into the 2 bags. How many kilograms of flour were there in each bag?

**[Answer: 10]**