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Presentation On Multiplication

Home > PowerPoint Slides > Presentation On Multiplication
Published in: Mathematics
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Several Methods of Multiplication

Nishat P / Dubai

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Qualification: Master degree. Subject Economics

Teaches: Maths, Islamic

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  1. Multiplication The methods of Multiplication Multiply Multiple Times Sets of Lots of Factors Groups of Product Nishat
  2. Multiplication: • Multiplication means repeated addition of a number. Before learning multiplication you must know counting and adding very well. Memorizing the times tables will help to do multiplication. Times tables are a list of multiples of a number. A times table fact is the answer to a multiplication number sentence. In this notes we will learn some easy methods of Multiplication: . Addition Method 2. Grid Method Multiplication 3. Partitioning Multiplication 4. Informal Partitioning Multiplication 5. Expanded Method Multiplication 6. Long Multiplication
  3. Addition Method: • One of the most basic ways to multiply is to add. When we multiply two numbers, we're simply adding one number to itself a certain number of times. We can say adding groups of numbers. For example, if the problem says to multiply 10 x 5, it means 5 groups of 10 or 10 groups of 5. We can either: 10 + 10 + 10 + 10 + 10 = 50 or 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 50 So, the answer of 10 x 5 = 50.
  4. Grid Method Multiplication: • The grid method is a easy method for more than one digits number multiplication. Example: 52 x 5 = ? The two digit numbers (52) need to make partition (break apart), i.e tens and ones ( 50 and 2). Multiply the partitioning numbers and add the answers. so aso 2 10 50 x 5 = 250 2 x 5=10 250 + 10 = 260 The answer of 52 X 5 = 260
  5. Partitioning Multiplication: • Partitioning numbers is a helpful way to solve multiplication problems involving numbers larger than one-digit numbers. This way is similar to grid method. Example: 84 x 7 = ? The number 84 must need to separate into tens and ones then multiply with 7 and then add the two answers. 80 x 7 = 560 4 x 7=28 560 +28 = 500 + 60 + o +20 +8 = 588 the Answer of 84 x 7 = 588
  6. Informal Partitioning Multiplication: • Informal partitioning is a way to solve multiplication problems by partitioning. For this method requires to have good understanding of place value and partitioning. Example: 35 x 6 = ? 30 5 30 x 6 = 180 30 210 The Answer of 35 x 6 = 210
  7. Expanded Method Multiplication: • This method is helpful for more than one digit numbers. To use this method need to have an understanding of partitioning. Example: 58 x 58 56 350 406 7 x8 -56 7 x 50 = 350 56 + 350 = 406 The Answer of 58 x 7 = 406
  8. Long Multiplication: • Short multiplication is a method using columns to set out and calculate a multiplication. Example: 132 x 24 = ? To set out the calculation, we need to list the numbers vertically and start the process of multiplication with the ones. 132 x 24 528 + 2640 3168 1st Step: 132 4 x 2 = 8 ones X 4 4 X 3 = 12 t (10 tens means 100 needs to carry out) 528 4 x 1 = 4 hundreds + 1 hundreds (previous carried number) = 5 hundreds 2nd Step: Drop a zero as we are multiplying with IOS 132 2 x 2 = 4 tens X 2 2 x 3=6 hundreds 2640 2 xl = 2 Thousands
  9. Multiplication Chart 1-100 18 21 14 20 16 24 28 36 10 20 30 35 12 24 36 42 28 42 70 48 81 90 20 40 60 70 80 90 100

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