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ABACUS - DECIMAL ADDITION a) The procedures for addition of decimals are same as those in the case of addition of whole numbers. ...

f) Example : 32.79 + 425.692 First set the number 32.76 in the abacus. Here you have only 3 digits after the decimal point. Henc ...

ABACUS - SUBTRACTION OF DECIMALS Abacus - Subtraction of decimals : The procedures followed in setting the decimal number for su ...

ABACUS - MULTIPLICATION OF DECIMALS Before multiplication, the multiplier and the multiplicand should be converted into whole nu ...

ABACUS – DIVISION OF DECIMALS Convert the dividend and the divisor into whole numbers. While converting the divisor and the divi ...

ABACUS – FRACTION ADDITION I. GENERAL RULES : a) Numerals such as 53 ,^107 etc., are known as fractions. In these fractions, the ...

denominator exceeds three digits, move the placement of the respective divisions according to your interest. You must note that ...

f) Now clear the numbers set in the extreme left. g) After clearing, set the numerator of the second fraction in the extreme lef ...

1) 54 + 87 2) 109 + 1312 3) 1514 + 54 4)^2 85 +^3 74 5)^12 79 +^14 72 6)^24 1613 +^27 41 7)^23594 +^9876 8)^13543 +^9876 EXERCIS ...

ABACUS – FRACTION SUBTRACTION a) The procedures followed in fraction addition are to be followed in fraction subtraction also. H ...

g) Now take the second fraction. Set the numerator 11 of the fraction in the extreme left, leave one column and set the denomina ...

EXERCISE 1. 5 76 –^3 52 2.^7 74 –^5 75 3.^10 32 –^7 54 4.^13 1511 –^8 54 5.^18 1512 –^12 83 6.^22 87 –^12 98 7.^34 3521 –^21 54 ...

ABACUS – FRACTION MULTIPLICATION I. GENERAL RULES : a) In fraction multiplication, the number should be converted into improper ...

e) Two alternatives are possible for solving this problem. i) Two abacuses may be used by the child, one for calculations and th ...

c) Now clear the number set in the first abacus. You are ready for your second fraction. Convert^12 1311 into improper fraction ...

j) Clear the first abacus. Set the denominator values as 6×13. The answer is 78. k) Clear the denominators of the second abacus ...

EXERCISE 1. 54 × 87 2. 109 × 1312 3.^1415 × 458 4.^2 86 ×^3 74 5.^12 97 ×^14 72 6.^24 1613 ×^27 41 7.^235 49 ×^98 76 8.^135 43 × ...

ABACUS – DIVISION OF FRACTIONS a) If you are through with fraction – multiplication, fraction - division will not be difficult. ...

i) Now divide the dividend 162 by the divisor 100. You will get 1 as the quotient and 62 as the remainder, i.e., 1 10062. The fr ...

ABACUS – SQUARE ROOT I. GENERAL RULES : a) Consider the number 25. 25 can be written as 5x5. Here 5 and 5 are known as factors. ...