 | Joseph Ray - Arithmetic - 1880 - 420 pages
...EXPLANATION. We learned in Art. 371 that the square of a number composed of tens and units is equal to the square of the tens, plus twice the product of the tens by the units, plus the square of the units. The square of (20 + 4), or 242, is 202 + 2 X (20 X 4) +... | |
 | H. Bryant - 1881 - 574 pages
...used. 304. Observe further, that the square af any number separated into tens and units is equal to the square of the tens, plus twice the product of the tens by (he units, plus the square, of the units. (Art. 355, 1.) 36'J. These two principles concerning the... | |
 | James Bates Thomson - Arithmetic - 1882 - 450 pages
...625 _ 400 _,_ 200 + 35 RULE. — The square of any number consisting of tens and units is equal to the square of the tens, plus twice the product of the tens by the units, plus the square of the units. j VOLUTION. ORAL EXERCISES. 720. l. What are the two equal... | |
 | Daniel W. Fish - Arithmetic - 1883 - 360 pages
...20 2 + 2x 20x7 + 72 PRINCIPLE. — T/ie square of a number consisting of tens and units is equal to the square of the tens, plus twice the product of the tens by the umts, plus the square of the units. Using t and и respectively to denote the tens and units... | |
 | Emerson Elbridge White - Arithmetic - 1883 - 370 pages
...PRINCIPLE AND RULE. ART. 361. Principle.— The square of a number, composed of tens and units, is equal to the square of the tens, "plus twice the product of the tens by the units, plus the square of the units. ART. 362. To extract the square root of a number: Rule.—1.... | |
 | Daniel W. Fish - Arithmetic - 1883 - 348 pages
...square of 20 + 7 or 27. PRINCIPLE.— TJie square of a number consisting of tens and units is equal to the square of the tens, plus twice the product of the tens by the units, plus the square of the units. Using t and u respectively to denote the tens and units... | |
 | Indiana. State Board of Education - 1886 - 360 pages
...square of 25. By analyzing the foregoing we find that 625, when compared with its square root, contains the square of the tens, plus twice the product of the tens by the units, plus the square of the units. Q 2 = 81 From the squares in the margin we may 99 3 = 9801... | |
 | Christian Brothers - Arithmetic - 1888 - 484 pages
...letters, we get the result <* + 2<w + it8. Hence, The square of a number expressed by two figures, equals the square of the tens, plus twice the product of the tens into the units, plus the square of the units. In like manner find the square of each of the following... | |
 | Andrew Jackson Rickoff - Arithmetic - 1886 - 688 pages
...where we may find them in the product. Thus, In this case we see that 365. The square of 43 is equal to the square of the tens, plus twice the product of the tens by the units, plus the square of the units. v- Q It may be shown that the same is true of any number.... | |
 | Andrew Jackson Rickoff - 1888 - 464 pages
...where we may find them in the product. Thus, in this case we see that 365. The square of 43 is equal to the square of the tens, plus twice the product of the tens by the units, plus the square of the units. It may be shown that the same is true of any number. Raise... | |
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Which proves that the square of a number composed of tens and units contains, the square of the tens plus twice the product of the tens by the units, plus the square of the units. 
