Ответ:
a) 22,284
b)
c) 999975
d)
e) 11
f) 239000
Объяснение:
a)
c) 1005*995 = 999975 (счёт столбиком)
e)
f)
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Answers & Comments
Ответ:
a) 22,284
b)![\frac{1}{5} \frac{1}{5}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B5%7D)
c) 999975
d)![\frac{179600}{81} \frac{179600}{81}](https://tex.z-dn.net/?f=%5Cfrac%7B179600%7D%7B81%7D)
e) 11
f) 239000
Объяснение:
a)![5,214^{2}-2,214^{2} = (5,214-2,214)*(5,214+2,214) = 3*7,428 = 22,284 5,214^{2}-2,214^{2} = (5,214-2,214)*(5,214+2,214) = 3*7,428 = 22,284](https://tex.z-dn.net/?f=5%2C214%5E%7B2%7D-2%2C214%5E%7B2%7D%20%3D%20%285%2C214-2%2C214%29%2A%285%2C214%2B2%2C214%29%20%3D%203%2A7%2C428%20%3D%2022%2C284)
b)![\frac{26^{2} - 12^{2}}{54^{2}-16^{2} }= \frac{(26-12)(26+12)}{(54-16)(54-16)} = \frac{14*38}{38*70} = \frac{14}{70} = \frac{1}{5} \frac{26^{2} - 12^{2}}{54^{2}-16^{2} }= \frac{(26-12)(26+12)}{(54-16)(54-16)} = \frac{14*38}{38*70} = \frac{14}{70} = \frac{1}{5}](https://tex.z-dn.net/?f=%5Cfrac%7B26%5E%7B2%7D%20-%2012%5E%7B2%7D%7D%7B54%5E%7B2%7D-16%5E%7B2%7D%20%7D%3D%20%5Cfrac%7B%2826-12%29%2826%2B12%29%7D%7B%2854-16%29%2854-16%29%7D%20%3D%20%20%5Cfrac%7B14%2A38%7D%7B38%2A70%7D%20%3D%20%5Cfrac%7B14%7D%7B70%7D%20%3D%20%5Cfrac%7B1%7D%7B5%7D)
c) 1005*995 = 999975 (счёт столбиком)
d)![\frac{898}{9} * \frac{100}{1} *\frac{2}{9} = \frac{898*100*2}{9*1*9} = \frac{179600}{81} \frac{898}{9} * \frac{100}{1} *\frac{2}{9} = \frac{898*100*2}{9*1*9} = \frac{179600}{81}](https://tex.z-dn.net/?f=%5Cfrac%7B898%7D%7B9%7D%20%2A%20%5Cfrac%7B100%7D%7B1%7D%20%2A%5Cfrac%7B2%7D%7B9%7D%20%3D%20%5Cfrac%7B898%2A100%2A2%7D%7B9%2A1%2A9%7D%20%3D%20%5Cfrac%7B179600%7D%7B81%7D)
e)![\frac{5832-343}{324+126+49} = \frac{5489}{499} = 11 \frac{5832-343}{324+126+49} = \frac{5489}{499} = 11](https://tex.z-dn.net/?f=%5Cfrac%7B5832-343%7D%7B324%2B126%2B49%7D%20%3D%20%5Cfrac%7B5489%7D%7B499%7D%20%3D%2011)
f)![82369-13776+170407 = 239000 82369-13776+170407 = 239000](https://tex.z-dn.net/?f=82369-13776%2B170407%20%3D%20239000)