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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