# How can you add and subtract quickly?

## How can you add and subtract quickly?

1. To add 9 to another number, add 10 and then subtract 1: 36 + 9 = 36 + 10 – 1 = 45.
2. To add 18 to another number, add 20 and then subtract 2: 48 + 18 = 48 + 20 – 2 = 66.
3. To add 97 to another number, add 100 and then subtract 3: 439 + 97 = 439 + 100 – 3 = 536.

## What is the correct order of operations?

The order of operations is a rule that tells the correct sequence of steps for evaluating a math expression. We can remember the order using PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Step-by-step explanation: Since, when a given number is increased by 1 then we get the next number of that number, Also, we know that a next number of a number is called successor while the previous number of the number is called predecessor of the number. Thus, the answer would be successor.

What to do with addition table 1-12?

Addition table 1-12 has a smart cowboy theme. Make students read the addends aloud and find the sum. They need to fill in the answers on the blank table pdfs here. Addition charts help the kids to recall the simple addition facts. Vehicle themes are used. The pdf charts are partially filled with sums. Complete the chart by finding the sums.