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\(=\left(-67\right).\left(-33\right)-67.77+\left(-67\right).33-77.33\)
\(=\left[\left(-67\right).\left(-33\right)+\left(-67\right).33\right]-66.77-77.33\)
\(=-77\left(66+33\right)=-77.99=-7623\)
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95 - (129 - 74) : 5 + 2022⁰
= 95 - 55 : 5 + 1
= 95 - 11 + 1
= 95 - 10
= 85
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(-67) + 125 + (-33) + 75
= (125 + 75) - (67 + 33)
= 200 - 100
= 100
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86.(-108) + 86.9 - 86
= 86.(-108 + 9 - 1)
= 86.(-100)
= 8600
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\(\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right).\left(\dfrac{1}{3}-\dfrac{1}{4}-\dfrac{1}{12}\right)\)
\(=\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right).\left(\dfrac{4}{12}-\dfrac{3}{12}-\dfrac{1}{12}\right)\)
\(=\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right).\left(\dfrac{4-3-1}{12}\right)\)
\(=\left(\dfrac{66}{111}+\dfrac{2}{33}+\dfrac{15}{117}\right).0\)
\(=0\)
\(\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot\left(\dfrac{1}{3}-\dfrac{1}{4}-\dfrac{1}{12}\right)\\ =\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot\left(\dfrac{4}{12}-\dfrac{3}{12}-\dfrac{1}{12}\right)\\= \left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot\left(\dfrac{4-3-1}{12}\right)\\= \left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot0\\ =0\)
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23 x 67 + 63 x 67 + 67 x 14 + 100 x 33
= 67 x (23+63+14) +100 x 33
= 67 x 100 + 100 x 33
= 100 x (67+33)
= 100 x 100
= 10000
tk cho mình nha!
= ( 23 + 63 + 14 ) x 67 + 100 x 33
= 100 x 67 + 100 x 33
= 100 x ( 67 + 33 )
= 100 x 100
= 10 000
Đó chính là đáp án nha bạn. Hok tốt
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a) (x + 5) / 95 + (x +10)/90 + (x + 15)/85 + (x + 20)/80 = -4
<=> (x + 5)/95 + (x + 5)/90 + 5/90 + (x + 5)/85 + 10/85+ (x + 5)/80 + 15/80 = -4
<=> (x + 5)(1/95+1/90+1/85+1/80) =-4 -5/90-10/85-15/85
<=> (x + 5)(1/95+1/90+1/85+1/80)= -1-(1 + 5/90 )-(1 + 10/85) - (1 + 15/80)
<=>(x + 5)(1/95+1/90+1/85+1/80) = -1 - 95/90 - 95/85 - 95/80
<=>(x + 5)(1/95+1/90+1/85+1/80) = -95 (1/95+1/90+1/85+1/80)
<=> x + 5 = -95 => x = -100
(67+ 95) + 33 = (67+ 33) + 95 = 100 + 95 = 195