The Cleanest Village

When adding numbers

When adding numbers, if the sum in any place value exceeds 9, we regroup by carrying over to the next higher place value. For example, when adding 438

When subtracting

When subtracting, if we cannot take away from a place value, we borrow from the next higher place value. For instance, 438 - 215 = 223 children waitin

Using addition and subtraction to solve

Using addition and subtraction to solve problems involving rupees, finding costs, calculating balance amounts, and determining total expenses. Example

Reading and understanding problems

Reading and understanding problems, identifying what operation to use, and solving step by step. Drawing pictures or using concrete materials helps vi

Making reasonable guesses about answers before

Making reasonable guesses about answers before calculating exact values. This helps check if our final answer makes sense.