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" Find the diiference between 430172 and 189567. THE DIFFERENCE BETWEEN TWO NUMBERS WILL NOT BE ALTERED IF THE SAME QUANTITY IS ADDED TO BOTH OF THEM. Illustrations : " Conceive two baskets with pebbles in them, in the first of which are 100 pebbles more... "
The Elements of Arithmetic - Page 19
by Augustus De Morgan - 1840 - 166 pages
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The science and art of arithmetic, by A. Sonnenschein and H.A. Nesbitt.d Pt.1

Adolf Sonnenschein - 1870 - 206 pages
...BETWEEN TWO NUMBERS WILL NOT BE ALTERED IF THE SAME QUANTITY IS ADDED TO BOTH OF THEM. Illustrations : " Conceive two baskets with pebbles in them, in the...are 100 pebbles more than in the second. If I put 50 more pebbles into each of them, there are still only 100 more in the first than in the second."...
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The science and art of arithmetic, by A. Sonnenschein and H.A. Nesbitt ...

Adolf Sonnenschein - 1880 - 496 pages
...BETWEEN TWO NUMBERS WILL NOT BE ALTERED IF THE SAME QUANTITY IS ADDED TO BOTH OF THEM. Illustrations : " Conceive two baskets with pebbles in them, in the...are 100 pebbles more than in the second. If I put 50 more pebbles into each of them, there are still only 100 moru in the first than in the second."...
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