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New Page 1 Lesson2 Multiplying a number by 11 To multiply any number by 11 we fair(a) put the total of the two figures between the 2 figures. 32X11 here first we make unnecessary 2 of 32 extreme justifiedly ,now tack up 3+2 =5 ,put 5 before 2 and write 3 extreme unexpended .Required answer is 352 322x11 Write extreme right 2of 322 and add up 2&2 of 322 , 2+2=4 ,write 4 before 2 Now our partial answer is ...........42 .Again add up 3&2 of 322 .3+2 =5 write before ..42 .Now our partial answer becomes ..542 .Put 3 before 5 . Now our required answer is 3542 q 77 x 11 = 847 This involves a carry figure because 7 + 7 = 14 we get 77 x 11 = 7147 = 847 Multiplication of 22 ,33 ,44 ,55, 66 , 77 ,88 I think all of you understand this concept . It is a very useful tool ,with the stand by of this tool now we learn multiplication of 22 ,33 .44 ,55. 66 . 77 ,88 22x45 =( 2x11)x45 = 11x(2x45)=11x90= 990 33x66 = (3x11)x66 = 11x(3x66)= 11x198= 2178 44x356=(4x11)x356= 11x(4x356)=11x 14 24=1 5664 55x58 =(5x11)x28 = 11x( 5x28) = 11x 140 = 1540 66x23 =(6x11)x23 = 11x(6x23) = 11x138 = 1518 uniform way 77 =7x11 and 88=8x11 Multiplication of 11 is ample time saver How ??? You can do calculations in beat very fast by this tool As you turn in value of ? is 22/7 .

You can break it as 2x11/7 Ex Find the area of circle of universal gas constant of 14 cm (22/7)x14x14=11x2x2x14=11x56=616square cm All calculation mentally, no rough work , a great time saver. saddle:///D|/Documents%20and%20Settings/sanjay/Desktop/maths%20tricks/lesson2.html (1 of 2)6/25/2003 4:02:30 PM New Page 1 Practice Test 2 light up mentally these questions Note down calculation time by your watch (Suggested time 180 seconds) 11 X 356 11 X 9587 587 X 22 33 X 52 44 X 897 758 X 88 121 X789* 11 X 9874 487 x99 Find the volume of a athletic field of radius of 10.5 cm* *Hints 121 X 789 = 11 X11 X789 = 11 X 8679=95469 volume of sphere = 4?r3 3 4 x 10.5 x10.5x10.5 x22 = 3 7 = 4 x0.5 x 10.5x 10.5 x 22 = 2x2 x0.5 x 10.5x10.5 x22 = (2x 10.5)(2x10.5 )(0.5x22) = 21 x21 x11 =... If you want to get a full essay, order it on our website: Orderessay

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