Solve the Multiplication Problem: Calculate 2 × 10

Q: What's the difference between 2 + 10 and 2 × 10?

Addition (2 + 10 = 12) means combining two numbers. Multiplication (2 × 10 = 20) means repeated addition - adding 2 ten times or adding 10 two times.

Q: Why do we get a positive answer when multiplying two positive numbers?

When you multiply positive × positive, you always get a positive result. Think of it as adding positive groups together - you can only get more positive!

Q: Is there a quick way to multiply by 10?

Yes! When multiplying any number by 10, just add a zero to the end. So 2 × 10 = 20, 5 × 10 = 50, and 13 × 10 = 130.

Q: What if I accidentally wrote 2 + 10 instead?

No problem! Just remember the multiplication symbol (×) means repeated addition. If you see 2 × 10, think 'How much is 2 added to itself 10 times?' That's 20, not 12.

Basic Multiplication with Positive Integers

Complete the following exercise:

$2\cdot10=$

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations

00:00 Solve

00:03 Positive times positive is always positive

00:10 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

Complete the following exercise:

$2\cdot10=$

Step-by-step solution

Let's remember the rule:

$(+x)\times(+x)=+x$

Therefore, the sign of the exercise result will be positive:

$+2\times+10=+20$

Final Answer

Key Points to Remember

Essential concepts to master this topic

Rule: Multiplying two positive numbers always gives a positive result
Technique: Calculate 2 × 10 by adding 2 ten times or 10 two times
Check: Count by twos ten times: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 ✓

Common Mistakes

Avoid these frequent errors

Confusing multiplication with addition
Don't add 2 + 10 = 12! This gives the wrong answer because you're using addition instead of multiplication. Always remember that 2 × 10 means '2 groups of 10' or 'add 2 ten times' which equals 20.

Practice Quiz

Test your knowledge with interactive questions

Convert $\frac{7}{2}$ into its reciprocal form:

FAQ

Everything you need to know about this question

What's the difference between 2 + 10 and 2 × 10?

Addition (2 + 10 = 12) means combining two numbers. Multiplication (2 × 10 = 20) means repeated addition - adding 2 ten times or adding 10 two times.

Why do we get a positive answer when multiplying two positive numbers?

When you multiply positive × positive, you always get a positive result. Think of it as adding positive groups together - you can only get more positive!

Is there a quick way to multiply by 10?

Yes! When multiplying any number by 10, just add a zero to the end. So 2 × 10 = 20, 5 × 10 = 50, and 13 × 10 = 130.

How can I check if 20 is the right answer?

Try different methods:

Count by 2s ten times: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Count by 10s two times: 10, 20
Use division: 20 ÷ 2 = 10 ✓

What if I accidentally wrote 2 + 10 instead?

No problem! Just remember the multiplication symbol (×) means repeated addition. If you see 2 × 10, think 'How much is 2 added to itself 10 times?' That's 20, not 12.

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