Page 146 - Demo

Arrow-Puffin-4_Semester-1 Maths 145Multiply 5 %u00d7 2 and 5 %u00d7 3.Write the answers as shown.Now, add the numbers along each diagonal, starting at the right.Therefore, 32 x 58 = 1856Next, multiply 8 %u00d7 2 and 8 %u00d7 3 and write the product as shown.3 21 5 01 583 211065412583 211065 681 541258Diagonal is a straight line joining two opposite corners of a square / rectangle.Example 2 : Multiply 658 %u00d7 47 by using lattice method. 5 8472 3 0 2 4 265 847 542 3 5 62 3 0 2 4 26 1%u2022 Draw a 3 x 2 grid.%u2022 Draw diagonals of small squares.%u2022 Multiply 4 x 8, 4 x 5, 4 x 6 and write the product as shown.%u2022 Next, multiply 7 x 8, 7 x 5 and 7 x 6 and write the product.%u2022 Then going from right to left, add the numbers down the diagonals as shown.%u2022 The first diagonal has only 6. Bring 6 down.Write one number across the top and the other down the right side, lining up the digits with the boxes.3 2585 8472 6593042 3 5 62 3 0 2 4 21 6 1%u2022 The second diagonal has 2,5 and 5. Add these numbers. We get 12. Write 2 down and carry over 1 to the next diagonal.%u2022 The third diagonal has 3, 0 3 and 2. Add these numbers, to get 8 and add 1 (carried over) to 8 to get 9.