Page 159 - Demo

158 Arrow-Puffin-1_Semester-1 MathsWhen we add numbers by writing them one next to the other, it is called horizontal addition.12 + 3 = 15We can also add numbers by writing them one below the other. This is called vertical or column addition. 1 2+ 3 1 5II. Add the following.Add 81 and 7. Add 63 and 5. Add 42 and 6. Add 54 and 4.T O T O T O T OAddition of a Two-Digit Number to a Two-Digit NumberYou have learnt about addition of a two-digit number to a one-digit number. We can also add two-digit numbers.To add a two-digit number to another two-digit number, we must find the sum of the digits in the ones place and then the sum of the digits in the tens place.2 tens + 3 ones1 ten + 4 onesAdd 23 and 14.Tens Ones 2 3+ 1 4 Let's Understand Conceptual Understanding