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What is 7 multiplied by 9?
A. 56
B. 63
C. 72
D. 54
Correct Answer Is Option = 63
Notes / Explanation
When the number seven is multiplied by nine, the result is sixty-three, and this calculation provides a good opportunity to reflect on the operation of multiplication, which is one of the most basic and important skills in arithmetic. Multiplication is a way of adding a number to itself a certain number of times, so that multiplying seven by nine is the same as adding seven to itself nine times, or equally adding nine to itself seven times, and in either case the total comes to sixty-three. Multiplication is a much quicker way of carrying out this repeated addition than actually adding the numbers one by one, which is why a good knowledge of multiplication is so valuable. The fact that seven multiplied by nine equals sixty-three is one of the facts contained in the multiplication tables, which students are encouraged to learn by heart, because a firm knowledge of the tables allows such calculations to be carried out quickly and accurately without needing to work them out step by step each time. There are several ways to arrive at the answer for anyone who does not immediately recall it. One method is to build up from a known fact, for example by recalling that seven multiplied by ten is seventy, and then subtracting one seven to account for the difference between multiplying by ten and multiplying by nine, which gives seventy minus seven, equal to sixty-three. Another method is to add seven to itself the required number of times, though this is slower. A good command of the multiplication tables and of methods for working out multiplications is extremely useful, not only for solving problems in mathematics but also for dealing with countless practical situations in everyday life, such as calculating quantities, prices and measurements. For this reason, practice in multiplication is an important part of building a strong foundation in arithmetic, and speed and accuracy in basic calculations are valuable skills. Questions testing the ability to carry out such calculations are common in examinations, where a quick and accurate command of basic arithmetic can be very helpful in saving time. For PPSC and other competitive examinations, the key points to remember are that seven multiplied by nine equals sixty-three, that multiplication is a quick way of carrying out repeated addition, that this fact is part of the multiplication tables which are worth learning by heart, and that a multiplication such as this can also be worked out by building up from a related known fact.