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# Work out the following multiplication.

12345679

__× 9__

________

Use the result to answer the following questions.

(a) What will be 12345679 × 45?

(b) What will be 12345679 × 63?

(c) By what number should 12345679 be multiplied to get 888888888?

(d) By what number should 12345679 be multiplied to get 999999999?

**Solution:**

12345679

__× 9__

111111111

(a)To obtain 12345679 × 45 we multiply the above result by 5 to get 555555555.

(b)To obtain 12345679 × 63 we multiply the above result by 7 to get 777777777

(c) 12345679 has to be multiplied by 72 to get 888888888

(d)12345679 has to be multiplied by 81 to get 999999999

**✦ Try This: **Work out the following multiplication.

12345679

__× 9__

________

Use the result to answer the following questions.

(a) What will be 12345679 × 27?

(b) What will be 12345679 × 36?

(c) By what number should 12345679 be multiplied to get 777777777?

(d) By what number should 12345679 be multiplied to get 666666666?

12345679

__× 9__

111111111

(a)To obtain 12345679 × 27 we multiply the above result by 5 to get 333333333.

(b)To obtain 12345679 × 36 we multiply the above result by 7 to get 444444444

(c) 12345679 has to be multiplied by 63 to get 777777777.

(d)12345679 has to be multiplied by 54 to get 666666666..

**☛ Also Check: **NCERT Solutions for Class 8 Maths Chapter 16

**NCERT Exemplar Class 8 Maths Chapter 13 Problem 70**

## Work out the following multiplication. 12345679 × 9 = ___. Use the result to answer the following questions. (a) What will be 12345679 × 45, (b) What will be 12345679 × 63, (c) By what number should 12345679 be multiplied to get 888888888, (d) By what number should 12345679 be multiplied to get 999999999?

**Summary:**

12345679 × 45 = 555555555; 12345679 × 63 = 777777777; 12345679 has to be multiplied by 72 to get 888888888; 12345679 has to be multiplied by 81 to get 999999999.

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