|
|
 |
| Авторизация |
|
|
|
| Поиск по указателям |
|
|
|
|
|
|
|
 |
|
|
|
| Menninger K. — Calculator's cunning. The art of quick reckoning |
|
|
|
| Предметный указатель |
Abbreviated multiplication of decimals 45(b)
Addition 16—28
Addition, mental 21
Addition, test for 10
Approximation 62(a) 90—92
Arithmetical progression 23
Audit 25
Auxiliary number (divisibility) 79(a)
Beginning-squares 61(a)
Boundary estimate 90
Boundary-division 80—87
Calculator, for the experienced 17 24 32 34(d) 39 44 45 47 49 3 51 61(c) 62(c) 79 83 85 86 87 92 95
Capital value 98
Carry-over 22 6 24 70
Casting out 9-packets 6(b)1
Catching the wren 100
Chain of fractions 90
Column multiplication 49
Cross-multiplication 42—48
Cross-multiplication with 10-complement 47
Cross-multiplication with n-fold 10-complement 47
Cross-multiplication, double-digit 46
Cross-multiplicationof numbers with more digits 45
Cross-multiplicationof two-digit numbers 42
Cross-sum 2
Decimals 14 45 6 67 68 69 73 85 90 97(c)
Decimals, point rules 90
Discarding multiples 79
Distance in km 37
Divisibility by 11 77 78 79
Divisibility by 13 78 79
Divisibility by 7 77 79
Divisibility by any divisor 79
Divisibility rules 76—79
Divisibility rules for any divisor 79
Divisibility rules with auxiliary number 79(a)
Divisibility rules with complement-remainder 79(b)
Divisibility rules, simple 77
Division 76—88
Division by a boundary 73
Division by a number near a unit-boundary 85 86
Division by a prime number 87
Division by a unit-boundary 66
Division cross (boundary-division) 82
Division methods, boundary division 71 80—87
Division methods, unusual factor-division 71—79
Division of decimals 90
Division of decimals and subtraction at the same time 24
Division of decimals, short 70
Division of decimals, test for 9
Double of a two-digit number 26 2 29(b)
Double test 15
Double-digit, trick of the 46
Eleven-test 13 14
ER=eleven-remainder 13
Error of position 5(a) 15
Error, decimal point 5(a)
Error, typing 5(b)
Fabulous number 1001 78
Factor-division 71—75 97
Factor-division by a prime number 87
Factor-multiplication 57
Factorisation 57 76—79
Factorising and recombining 57
Finger-multiplication 100
Formula for difference of two squares 54 59 60 61(d) 62 64
Fractions, comparison of 96
Fractions, enlarging and contracting 97(a)
Fractions, transformation to decimals 73
Funnel-multiplication 45 6
Funnel-squaring 60
Group-vision 29(a)
Half of a number 26 2 29(b)
Key equation (percentages) 93
Large multiplication table 39
magic 11 37 78
Mathematician, for the 8 15 55 61(d)
Mental arithmetic 21 26 61 62 90
Mental arithmetic, semi 22(a)
| Mirror-numbers 54
Miser, amusing story 78
Money sums 25 27
Multiplication 28—57
Multiplication by particular numbers 28—38
Multiplication of numbers near a boundary 50—56
Multiplication table 39—41
Multiplication table on the fingers 41(b)
Multiplication table, large 39
Multiplication table, medium 41(a)
Multiplication table, small 1 39
Multiplication, column 49
Multiplication, cross 42—48
Multiplication, devices for written 56
Multiplication, factor 57
Multiplication, special methods by sliding 45(a)
Negative numbers, work with 45 90
Neighbouring squares 64 9
Neighbouring squares, errors 5(b) 15
Neighbouring squares, multiples 5
Nine-test 2—12
Nine-test, certainty 6
NR = nine-remainder 8
Order of magnitude 1 5(a) 89
Original value 94
percentages 93—99
Percentages, formulae 95 98
Percentages, fundamental types of sum 94
Percentages, ground-value 94 98
Percentages, idea 94
Percentages, key equation 93 99
Percentages, original value 94 98
Percentages, percentage-ratio 93 96 97
Percentages, percentage-value 95
Percentages, stem-fractions, p-ratios 92 95 97 99
Point rules for decimals 90
Powers of 10 61 90
Powers of estimate with 90
Powers of working with 90
Prime numbers 76 87
Reading out large numbers 29(d)
Remainder calculation 8 6 13 15
Remainder calculation, rule (factor-division) 74
Retaining numbers 22(a) 70
Round numbers 1 90
Slide rule 90 97
Sliding method 45(a)
Slope as a percentage 96
Speeds, conversion 33(a)
Splitting up a number 21 26 29(a)
squares 58—65
Stem-fractions 92 93 97
Steps, working in 19
Subtraction 24—27
Subtraction by adding up 24
Subtraction from a unit boundary 27
Subtraction of several amounts from one, so-called audit 25
Subtraction, Austrian 24
Subtraction, mental 26
Subtraction, test for 11
Teachers of arithmetic, for 6 17 26 29(b) 41(a) 56 57 59 61 70 90 10
Teachers of arithmetic, packets 17 10
Teachers of arithmetic, powers 90
test 1—12 79
Test for decimals 14
Test for decimals, complement 26
Test for decimals, double test 15
Test for decimals, multiplication 3 9— 1—12 9—11
Test for decimals, powers 12
Test for decimals, roots 12
Test for decimals, rule (fabulous number) 78
Test for decimals, stem-fractions 92
Test for decimals, subtraction 11 25 37 79
Test, addition 10
Test, division 9 11 13 14
Two-digit numbers, working with 21 26 29
Unit-boundary 27 55 85 90
Unit-boundary, division by 66 79(b)
Zero-factor (test) 7
|
|
|
| Реклама |
|
|
|
|
|
О проекте