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Βιβλία Βιβλία 1 - 10 από 165 για A number is divisible by 3 if the sum of its digits is divisible by 3• A number....
" A number is divisible by 3 if the sum of its digits is divisible by 3• A number is divisible by 9 if the sum of its digits is divisible by 9. "
A Complete Arithmetic: Oral and Written - Σελίδα 18
των Malcolm MacVicar - 1878
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Elementary Algebra

1870
...what scale is 5 1 1 1 73 written 572640 ? 7. Shew that a number in the Common scale is divisible : (1) by 3 if the sum of its digits is divisible by 3. (2) by 4 if the last two digits be divisible by 4. (3) by 8 if the last three digits be divisible by...

The science and art of arithmetic, by A. Sonnenschein and H.A ..., Μέρος 1

Adolf Sonnenschein - 1873
...derived from the Latin digitut, a finger, the fingers being the natural counters. Learn by heart : A number is divisible by 3 if the sum of its digits is divisible by 3. NOTE. Every number divisible by 9 is divisible by 3 ; bat not every number divisible by 3 is divisible...

The Science of Arithmetic: For High Schools, Normal Schools, Preparatory ...

Edward Olney - 1876 - 294 σελίδες
...with an odd digit. 146. 1. It is possible that a number ending in any figure is divisible by 3. 2. Any number is divisible by 3, if the sum of its digits is so divisible, and not otherwise. DEM. — 1. There is no digit that may not be produced in the right-hand...

The Elements of Arithmetic, Oral and Written: Designed for Pupils in the ...

Horatio Nelson Robinson - 1877 - 208 σελίδες
...number is divisible L By 2, if it is an even number. Thus, 20, 24, 36, and 44 are divisible by 2. 2. By 3, if the sum of its digits is divisible by 3. Thus, 135,471, and 1134 are divisible by 3. 3. By 4, if its two right-hand figures are ciphers, or...

The Franklin Written Arithmetic: With Examples for Oral Practice

Edwin Pliny Seaver, George Augustus Walton - 1878 - 348 σελίδες
...above, the first part is divisible by 3. The other part is equal to the sum of its digits. Hence a number is divisible by 3 if the sum of its digits is divisible by 3. 14. The Greatest Common Factor of Numbers (Art. 175). The method of finding the gcf of numbers, as...

The Franklin Written Arithmetic: With Examples for Oral Practice

Edwin Pliny Seaver, George Augustus Walton - 1878 - 348 σελίδες
...above, the first part is divisible by 3. The other part is equal to the sum of its digits. Hence a number is divisible by 3 if the sum of its digits is divisibk by S. 14. The Greatest Common Factor of Numbers (Art. 175). The method of finding the gcf...

The Franklin Written Arithmetic

Edwin Pliny Seaver, George Augustus Walton - 1879 - 316 σελίδες
...above, the first part is divisible by 3. The other part is equal to the sum of its digits. Hence a number is divisible by 3 if the sum of its digits is divisible by S. 14. The Greatest Common Factor of Numbers (Art. 175). The method of finding the gcf of numbers,...

A Practical Arithmetic

George Albert Wentworth, Thomas Hill - 1881 - 351 σελίδες
...number is divisible by 8 (2s) if the number denoted by the last three digits is divisible by 8. 4. A number is divisible by 3 if the sum of its digits is divisible by 3. 5. A number is divisible by 9 (32) if the sum of its digits is divisible by 9. 6. A number is divisible...

National Arithmetic: Oral and Written : for Common Schools, Academies, Etc

Joseph Ficklin - 1881 - 394 σελίδες
...138. Any number is exactly divisible 1. By 2, if it ends with a cipher or a digit divisible by 2. 2. By 3, if the sum of its digits is divisible by 3. 3. By 4, if the number expressed by the two figures on the right is exactly divisible by 4. 4. By 5,...

A Practical Arithmetic

George Albert Wentworth, Thomas Hill - 1882 - 351 σελίδες
...number is divisible by 8 (2s) if the number denoted by the last three digits is divisible by 8. 4. A number is divisible by 3 if the sum of its digits is divisible by 3. 5. A number is divisible by 9 (32) if the sum of its digits is divisible by 9. 6. A number is divisible...




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