1) -60:(56-59+3*(-1))= -60:(56-59-3)= -60:(14-3)= -60:11= -5.45
2) (-9-12:(-3)-3)4= (-9+4-3)4= (-8)*4= -32
3) -100(-0.09)+5(-0.01)= 9+(-0.05)= 9-0.05= 8.95
4) (1/6 - 3/4) (-9)= (-11/12)(-9)= 11
5) 35/54:(5/6-2)= 35/54:(-7/6)= 35/54*(-6/7)= -5/9
6) (2.9-7.1) : (-0.7)= -4.2 / (-0.7)= 6
7) 18:(-18.4-8.6)= 18 / (-27)= -2/3
8) (- одна целая 1/7) : 0.8 + 2.2 (-5/11)= (-8/7) / 0.8 + 2.2 (-5/11)= (-8/7) / 0.8 + (-11/5)= -1.14 + (-11/5)= -1.14 -2.2= -3.34
Уравнения:
9) -x*(-0.6) = -240x = -240 / 0.6x = 400
10) x / (-2.8) = 0.15x = 0.15 * (-2.8)x = -0.42
11) -3/7x = 27/28x = (27/28) / (-3/7)x = (27/28) * (-7/3)x = -7/4
1) -60:(56-59+3*(-1))
= -60:(56-59-3)
= -60:(14-3)
= -60:11
= -5.45
2) (-9-12:(-3)-3)4
= (-9+4-3)4
= (-8)*4
= -32
3) -100(-0.09)+5(-0.01)
= 9+(-0.05)
= 9-0.05
= 8.95
4) (1/6 - 3/4) (-9)
= (-11/12)(-9)
= 11
5) 35/54:(5/6-2)
= 35/54:(-7/6)
= 35/54*(-6/7)
= -5/9
6) (2.9-7.1) : (-0.7)
= -4.2 / (-0.7)
= 6
7) 18:(-18.4-8.6)
= 18 / (-27)
= -2/3
8) (- одна целая 1/7) : 0.8 + 2.2 (-5/11)
= (-8/7) / 0.8 + 2.2 (-5/11)
= (-8/7) / 0.8 + (-11/5)
= -1.14 + (-11/5)
= -1.14 -2.2
= -3.34
Уравнения:
9) -x*(-0.6) = -240
x = -240 / 0.6
x = 400
10) x / (-2.8) = 0.15
x = 0.15 * (-2.8)
x = -0.42
11) -3/7x = 27/28
x = (27/28) / (-3/7)
x = (27/28) * (-7/3)
x = -7/4