Page 145 - Demo

144 Arrow-Puffin-4_Semester-1 MathsMULTIPLICATION OF THREE NUMBERSLet's Understand Conceptual UnderstandingExample : Find the product of 23 x 34 x 17.%u2022 Multiply any two numbers first. 2 3x 3 49 26 9 07 8 2 Find the product.a. 13 x 28 x 19 b. 32 x 15 x 21 c. 18 x 27 x 41d. 12 x 18 x 35 e. 19 x 24 x 32Order of multiplication of three numbers does not change the product.LATTICE MULTIPLICATIONLattice multiplication is a method of multiplying numbers using a grid. The lattice method breaks the multiplication process into smaller steps.Here, we first do multiplication followed by addition.Example 1 :Multiply 32 x 58 by using lattice method.First draw a grid that has as many rows and columns as the multiplicand and the multiplier.The box with squares and diagonals is called a lattice. 7 8 2 x 1 75 4 7 47 8 2 01 3 2 9 4%u2022 Multiply the product of first two numbers with the third number.23 x 34 x 17 = 13,294Next, draw a diagonal through each box from upper right corner to lower left corner. Let's Practise 4.4 ApplicationLet's Understand Conceptual Understanding