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a: \(=\dfrac{\left(1.6-1.6\right)\cdot\left(2.29-0.76\right)}{1.6+2.53}\cdot\dfrac{3.06:7.5+3.4\cdot0.38}{19-2.6\cdot0.5}=0\)
b: \(=\dfrac{17.8\cdot9.4-7.8\cdot9}{3-0.3\cdot0.3}=\dfrac{97.12}{2.4}=\dfrac{607}{15}\)
\(\frac{17,8.3,7-7,8.4,8+5,7.17,8-4,6.7,8}{11,2+12,3+13,4-12,6-11,5-10,4}\)
\(=\frac{17,8\left(3,7+5,7\right)-7,8\left(4,8+4,6\right)}{\left(13,4-12,6\right)+\left(12,3-11,5\right)+\left(11,2-10,4\right)}\)
\(=\frac{17,8.9,4-7,8.9,4}{0,8+0,8+0,8}\)
\(=119,1\)
1) \(16,2\times3,7+5,7\times16,2-7,8\times4,8-4,6\times7,8\)
\(=16,2.\left(3,7\times5,7\right)-7,8.\left(4,8\times4,6\right)\)
\(=16,2.9,4-7,8.9,4\)
\(=9,4.\left(16,2-7,8\right)\)
\(=9,4.8,4=78,96\)
2) \(11,2+12,3+13,4-12,6-11,5-10,4\)
\(=\left(11,2-10,4\right)+\left(12,3-11,5\right)+\left(13,4-12,6\right)\)
\(=0,8+0,8+0,8\)
\(=0,8.3=2,4\)
1) 16,2×3,7+5,7×16,2−7,8×4,8−4,6×7,816,2×3,7+5,7×16,2−7,8×4,8−4,6×7,8
=16,2.(3,7×5,7)−7,8.(4,8×4,6)=16,2.(3,7×5,7)−7,8.(4,8×4,6)
=16,2.9,4−7,8.9,4=16,2.9,4−7,8.9,4
=9,4.(16,2−7,8)=9,4.(16,2−7,8)
=9,4.8,4=78,96=9,4.8,4=78,96
2) 11,2+12,3+13,4−12,6−11,5−10,411,2+12,3+13,4−12,6−11,5−10,4
=(11,2−10,4)+(12,3−11,5)+(13,4−12,6)=(11,2−10,4)+(12,3−11,5)+(13,4−12,6)
=0,8+0,8+0,8=0,8+0,8+0,8
=0,8.3=2,4
\(\frac{5.2^{18}.3^{18}.2^{12}-2.2^{28}.3^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}=\frac{5.2^{30}.3^{18}-2^{29}.3^{18}}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}=\frac{2^{29}.3^{18}\left(5.2-1\right)}{2^{28}.3^{18}\left(5-7.2\right)}\)
\(\frac{2^{29}.3^{18}.9}{2^{28}.3^{18}.-9}=\frac{2.9}{-9}=-2\)
