Ответ:
Решение:
1. (1615 - 2,25) · 0,16 - 0,42 : 0,4
\( 1615 - 2.25 = 1612.75 \)
\( 1612.75 \cdot 0.16 = 258.04 \)
\( 0.42 : 0.4 = 1.05 \)
\( 258.04 - 1.05 = 256.99 \)
2. -0,168 : 1,6 + 0,2 · (0,45 - 54)
\( -0.168 : 1.6 = -0.105 \)
\( 0.45 - 54 = -53.55 \)
\( 0.2 \cdot (-53.55) = -10.71 \)
\( -0.105 + (-10.71) = -0.105 - 10.71 = -10.815 \)
3. -0,54 · (-91) : (4,59 : 4,5 - 1,5) - 2
\( -0.54 \cdot (-91) = 49.14 \)
\( 4.59 : 4.5 = 1.02 \)
\( 1.02 - 1.5 = -0.48 \)
\( 49.14 : (-0.48) = -102.375 \)
\( -102.375 - 2 = -104.375 \)
4. -3 + (2,94 : 2,8 - 1,5) · (-91) : (-0,036)
\( 2.94 : 2.8 = 1.05 \)
\( 1.05 - 1.5 = -0.45 \)
\( -0.45 \cdot (-91) = 40.95 \)
\( 40.95 : (-0.036) = -1137.5 \)
\( -3 + (-1137.5) = -3 - 1137.5 = -1140.5 \)
5. (0,02 · 0,01 - 0,01) : 0,25 - 83
\( 0.02 \cdot 0.01 = 0.0002 \)
\( 0.0002 - 0.01 = -0.0098 \)
\( -0.0098 : 0.25 = -0.0392 \)
\( -0.0392 - 83 = -83.0392 \)
6. -43 + 8,5 · (0,021 : 0,01 - 2,51)
\( 0.021 : 0.01 = 2.1 \)
\( 2.1 - 2.51 = -0.41 \)
\( 8.5 \cdot (-0.41) = -3.485 \)
\( -43 + (-3.485) = -43 - 3.485 = -46.485 \)
7. (0,15 - 0,15 · 6,4) : (-83 + 0,175)
\( 0.15 \cdot 6.4 = 0.96 \)
\( 0.15 - 0.96 = -0.81 \)
\( -83 + 0.175 = -82.825 \)
\( -0.81 : (-82.825) \approx 0.009779 \)
8. (1,6 - 2,15 - 0,23) : (3,45 - 343)
\( 1.6 - 2.15 = -0.55 \)
\( -0.55 - 0.23 = -0.78 \)
\( 3.45 - 343 = -339.55 \)
\( -0.78 : (-339.55) \approx 0.002297 \)
Ответ: 1) 256.99; 2) -10.815; 3) -104.375; 4) -1140.5; 5) -83.0392; 6) -46.485; 7) 0.009779; 8) 0.002297.
