What is 16 + 4?

S1-SA1-1203

Grade Level:

Class 1

Maths, Computing, AI

Definition

What is it?

16 + 4 is a basic addition problem where you combine the value of the number 16 with the value of the number 4. Addition means finding the total sum when two or more numbers are put together.

Simple Example

Quick Example

Imagine your cricket team scored 16 runs in the first 5 overs. Then, in the next over, they scored 4 more runs. To find out the total runs scored, you would add 16 and 4.

Worked Example

Step-by-Step

Let's find the sum of 16 + 4:

Step 1: Write the numbers one below the other, aligning their ones place digits.
16
+ 4
----

Step 2: Add the digits in the ones place. Here, it's 6 + 4.
6 + 4 = 10.

Step 3: Since 10 is a two-digit number, write '0' in the ones place of the answer and 'carry over' the '1' to the tens place.
¹16
+ 4
----
0

Step 4: Now, add the digits in the tens place, including the carried-over '1'. Here, it's 1 (from 16) + 1 (carried over).
1 + 1 = 2.

Step 5: Write '2' in the tens place of the answer.
¹16
+ 4
----
20

So, 16 + 4 = 20.

Why It Matters

Understanding addition is fundamental to all of mathematics and computing. Engineers use addition to calculate material requirements for buildings, and data scientists use it to sum up data points for analysis. Even AI algorithms use basic arithmetic like addition for complex calculations.

Common Mistakes

MISTAKE: Not aligning numbers correctly before adding, especially when one number has more digits than the other. | CORRECTION: Always align the ones place digits, then the tens, hundreds, and so on, from right to left.

MISTAKE: Forgetting to carry over a digit when the sum of a column is 10 or more. For example, in 6 + 4 = 10, writing 10 in the ones place. | CORRECTION: Only write the ones digit of the sum (e.g., 0 for 10) and carry the tens digit (e.g., 1 for 10) to the next column.

MISTAKE: Adding the carried-over digit at the end instead of including it in the sum of the next column. | CORRECTION: The carried-over digit is added along with the original digits of the next column.

Practice Questions

Try It Yourself

QUESTION: Your mom bought 12 apples and then 8 more bananas. If you only count the apples she bought, how many are there? | ANSWER: 12 (The question asks only about apples, not the total fruit.)

QUESTION: A bus had 15 passengers. At the next stop, 5 more passengers got on. How many passengers are on the bus now? | ANSWER: 20

QUESTION: Your friend scored 18 marks in Science and 2 marks in English. Your marks are 10 in Science and 10 in English. Who has a higher total score, your friend or you? | ANSWER: Both have a total score of 20.

MCQ

Quick Quiz

What is the sum of 16 and 4?

164

The Correct Answer Is:

When you add 16 and 4, you combine their values. 6 (ones place of 16) + 4 (ones place of 4) equals 10. You write down 0 and carry over 1. Then, 1 (tens place of 16) + 1 (carried over) equals 2. So the total is 20.

Real World Connection

In the Real World

Imagine you're tracking scores in a gully cricket match. If Team A scores 16 runs in one innings and then 4 runs in another, you quickly add 16 + 4 to find their total score, which is 20. This is how commentators and scorekeepers calculate totals on the spot!

Key Vocabulary

Key Terms

ADDITION: The process of combining numbers to find their total sum | SUM: The result obtained when two or more numbers are added together | CARRY OVER: To transfer a digit from one column to the next column on the left during addition when the sum of a column is 10 or more | ONES PLACE: The rightmost digit in a whole number, representing units | TENS PLACE: The digit to the left of the ones place, representing groups of ten

What's Next

What to Learn Next

Great job understanding addition! Next, you can explore 'Addition with larger numbers' or 'Subtraction'. These concepts build directly on your understanding of basic addition and will help you solve even more complex problems.