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Ответ:
Решение:
1. 22 - 2,98 · 0,2 : 0,4 - 2,1 + 3,6
\( 2.98 \cdot 0.2 = 0.596 \)
\( 0.596 : 0.4 = 1.49 \)
\( 22 - 1.49 - 2.1 + 3.6 = 20.51 - 2.1 + 3.6 = 18.41 + 3.6 = 22.01 \)
2. 21,585 - 0,585 - 18,009 : 3 : 0,9 + 0,869 · 10
\( 18.009 : 3 = 6.003 \)
\( 6.003 : 0.9 = 6.67 \)
\( 0.869 \cdot 10 = 8.69 \)
\( 21.585 - 0.585 - 6.67 + 8.69 = 21 - 6.67 + 8.69 = 14.33 + 8.69 = 23.02 \)
3. 0,79 · 71 - 31,45 : 0,85 + 3,8 · 10,14 : 7,8
\( 0.79 \cdot 71 = 56.09 \)
\( 31.45 : 0.85 = 37 \)
\( 3.8 \cdot 10.14 = 38.532 \)
\( 38.532 : 7.8 \approx 4.94 \)
\( 56.09 - 37 + 4.94 = 19.09 + 4.94 = 24.03 \)
4. 3,13 · (36,599 + 4,026 - 8,545 - 0,08) : 4
\( 36.599 + 4.026 = 40.625 \)
\( 40.625 - 8.545 = 32.08 \)
\( 32.08 - 0.08 = 32 \)
\( 3.13 \cdot 32 = 100.16 \)
\( 100.16 : 4 = 25.04 \)
5. 23 - 0,05 · 10,1 + 0,395 : (49,001 - 49) · 0,009
\( 0.05 \cdot 10.1 = 0.505 \)
\( 49.001 - 49 = 0.001 \)
\( 0.395 : 0.001 = 395 \)
\( 395 \cdot 0.009 = 3.555 \)
\( 23 - 0.505 + 3.555 = 22.495 + 3.555 = 26.05 \)
6. 176 · (1,866 + 3,134 - 3,77) : (15,481 + 1,2 - 8,681)
\( 1.866 + 3.134 = 5 \)
\( 5 - 3.77 = 1.23 \)
\( 15.481 + 1.2 = 16.681 \)
\( 16.681 - 8.681 = 8 \)
\( 176 \cdot 1.23 = 216.48 \)
\( 216.48 : 8 = 27.06 \)
7. 21 - 0,2 · (92,28 - 91) + 73,26 : (10,45 - 0,45)
\( 92.28 - 91 = 1.28 \)
\( 0.2 \cdot 1.28 = 0.256 \)
\( 10.45 - 0.45 = 10 \)
\( 73.26 : 10 = 7.326 \)
\( 21 - 0.256 + 7.326 = 20.744 + 7.326 = 28.07 \)
8. 35,628 + 2,372 - 316,66 : 0,5 : (99,479 - 284,79 · 0,1)
\( 284.79 \cdot 0.1 = 28.479 \)
\( 99.479 - 28.479 = 71 \)
\( 316.66 : 0.5 = 633.32 \)
\( 633.32 : 71 \approx 8.92 \)
\( 35.628 + 2.372 - 8.92 = 38 - 8.92 = 29.08 \)
Ответ: 1) 22.01; 2) 23.02; 3) 24.03; 4) 25.04; 5) 26.05; 6) 27.06; 7) 28.07; 8) 29.08.
