By Takashi Kojima


Show description

Read Online or Download Advanced abacus: Japanese theory and practice PDF

Similar sports & outdoors books

Air Guns

В книге рассмотрена история пневматического оружия с древнейших времен по 1909 год, с кратким обзором современного (на момент выход книги) состояния этого вида стрелкового оружия.

Mountaineering: Training and Preparation

Even if you’re an skilled mountaineer, a hardened climber, or approximately to embark in your first excursion, not anything is extra severe than watching for, realizing, and getting ready for the adversities and accomplishments that wait for you and your group. In mountain climbing: education and guidance, Carlton Cooke, Dave Bunting, and John O’Hara, in addition to the individuals of the British military Everest West Ridge day trip staff and activity and workout scientists from LeedsMetropolitan college, proportion their insights, reports, and services on those elements of climbing: ·    choosing the right workforce for every excursion ·    actual conditioning and coaching courses to make sure good fortune ·    dietary innovations to your education and expeditions ·    crew defense, mountaineering precautions, and primary relief ·    getting ready for and surviving in severe stipulations From the technical facets of a climb to the management and teamwork abilities so necessary to good fortune, this accomplished consultant covers all the necessities for a secure and winning day trip.

Gun Data Book [Outdoor Life]

This e-book comprises all of the evidence and figures that hunters, marksmen, handloader and different gun fanatics want to know. the knowledge is gifted in a concise textual content and in over a hundred tables, a compilation of gun info that might function an enduring reference for future years.

Advances in Sport Science and Computer Science

Containing the court cases of the 2013 overseas convention on recreation technology and laptop technological know-how (CCCS 2013) held in Hong Kong, this publication brings jointly the newest study from either and academia, together with state of the art effects, exploration of latest components of study and improvement, and rising concerns dealing with activity technology and computing device technological know-how.

Additional info for Advanced abacus: Japanese theory and practice

Example text

Subtracting 19 from 20, add 1 to the 15 on EF. This gives you 16 on EF and 99 on BC (Fig. 159). STEP 4: As you cannot subtract 10 from the 8 on I, borrow 1 from the 16 on EF, and subtracting 10 from 12, add the result 2 to the 8 on I. This gives you 10 on HI and 15 on EF (Fig. 160). STEP 5: Now add 26 to the 99 on BC, and you get 125 on ABC. Add 2 to the 15 on EF, leaving 17 on EF. Add 7 to the 10 on HI yielding 17 on HI. Finally subtract 12 from this 17 and carry 1 to the 17 on EF. This gives you 5 on I and 18 on EF.

Set the second trial quotient figure 5 on B (Fig. 183). NOTE: The 5 on B corresponds with the b of the expression. STEP 5: Multiply the 4 on A by the 5 on B, and subtract the product 20 from the 22 on CD. This leaves 25 on DE (Fig. 184). STEP 6: Square the 5 on B, and subtract the product 25 from the 25 on DE, and the board is cleared of the dividend (Fig. 185). STEP 7: Finally halve the 4 on A into its original digit 2. Our square root is 25 on AB (Fig. 186). METHOD C: STEP 1: Set 625 on CDE, with E as the unit rod (Fig.

In a simple problem (one involving a two-digit answer) both methods of extracting a square 53 Advanced Abacus Japanese Theory and Practice, by Takashi Kojima root can be described by the binomial equation (a+b)2 - a2 - 2ab - b2 = 0. In a slightly more complicated problem (one involving a three-digit answer) both can be described by the equation (a + b + c)2 - a2 - 2ab - b2 - 2ac - 2bc - c2 = 0. To understand this compare the examples below, which show the standard written method (left) and the abacus method (right).

Download PDF sample

Rated 4.64 of 5 – based on 3 votes