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    example 1. Multiply 7 by 8.

                Solution:

                    • Touch the fingers marked with 7 and 8.
                                                                                                        7  8
                    • Count the fingers up to the touched fingers on both
                    hands and get the digit in the tens place. Here the

                    sum of the fingers on both hands is 2 (left hand) +                                7 x 8
                    3 (right hand) = 5

                    • Multiply the fingers above the touched fingers of both hands. 3 × 2 = 6
                Hence, 7 × 8 = 56.

                example 2. Multiply 8 by 8.

                Solution:
                    • Touch the fingers marked with 8.
                                                                                                       8  8
                    • Count the fingers up to the touched fingers on both
                    hands and get the digit in the tens place. Here the

                    sum of the fingers on both hands is 3 + 3 = 6

                    • Multiply the fingers above the touched fingers of both hands. 2 × 2 = 4
                Hence, 8 × 8 = 64.

                MulTipliCATioN By A 1-DigiT NuMBer

                We use multiplication tables to find the products.
                Multiplication of a 2- and 3-digit Number by a 1-digit Number

                (Without regrouping)

                example 1. Multiply 12 by 3.
                Solution.

                Step 1. Multiply the ones.                  Step 2. Multiply the tens.

                               T O                                   T O

                                1   2                                1   2
                               ×    3                                ×   3

                                    6                                3   6                    Keep in Mind

                          2 × 3 = 6 ones                    1 × 3 = 3 tens                    0 times a number is
                                                                                              always 0.
                So, 12 × 3 = 36.

                        76       Mathematics 3

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