75+98
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X + 75 - 98 = 75 - 98
X + 75 - 98 = -23
X + 75 = -23 + 98
X = 75 - 75
X = 0
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A.98 456..>...89 456 100 000.>...97 999 234 * 100...=.23 400 75 000 : 1000 ..=....75 B. 102 345....<.120 345 999 999..<.. 1 000 000 148 * 1000..=...148 000 380 000 : 1000 ..>.....308
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x : 98 = 75 dư 39
nên (x-39) : 98 = 75
(x-39) = 75 x 98
x - 39 = 7350
x = 7350 + 39
x = 7389
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Sao ma de vay troi ! Ne :
98 * 75 + 75 + 75= 98 * 75 + 75 *1 + 75 * 1= 75 *( 1+1+98)= 75 * 100 = 7500
Vay thui !
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\(=10\sqrt{2}-15\sqrt{3}-28\sqrt{2}+12\sqrt{3}=-3\sqrt{3}-18\sqrt{2}\)
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75 phút + 1 giờ 15 phút + 1,25 giờ \(\times\) 98
= 1 giờ 90 phút + 122,5 giờ
= 2 giờ 30 phút + 122 giờ 30 phút
= 124 giờ 60 phút
= 125 giờ