计算下列各题(能用简便算法的用简便算法计算):
(1) $-45÷32×\frac{1}{4}$;
(2) $\frac{8}{15}÷16\%×(-1\frac{1}{5})$;
(3) $(-1.75)÷(-3\frac{1}{2})×\frac{4}{7}$;
(4) $(-2\frac{4}{7})×(-1\frac{5}{6})÷(-1\frac{1}{21})$;
(5) $(-10\frac{1}{8})÷\frac{9}{4}×\frac{4}{9}÷(-2)$;
(6) $(-1.25)×\frac{5}{4}×(-8)÷(-\frac{3}{4})$;
(7) $(+3)×(-\frac{1}{5})÷(-2.8)×(+1\frac{3}{4})$;
(8) $(-7\frac{1}{3})×(-8)÷(-14\frac{2}{3})×3.25$。
(1) $-45÷32×\frac{1}{4}$;
(2) $\frac{8}{15}÷16\%×(-1\frac{1}{5})$;
(3) $(-1.75)÷(-3\frac{1}{2})×\frac{4}{7}$;
(4) $(-2\frac{4}{7})×(-1\frac{5}{6})÷(-1\frac{1}{21})$;
(5) $(-10\frac{1}{8})÷\frac{9}{4}×\frac{4}{9}÷(-2)$;
(6) $(-1.25)×\frac{5}{4}×(-8)÷(-\frac{3}{4})$;
(7) $(+3)×(-\frac{1}{5})÷(-2.8)×(+1\frac{3}{4})$;
(8) $(-7\frac{1}{3})×(-8)÷(-14\frac{2}{3})×3.25$。
答案
(1) $-\frac{45}{128}$
(2) $-4$
(3) $\frac{2}{7}$
(4) $-\frac{9}{2}$
(5) $1$
(6) $-\frac{50}{3}$
(7) $\frac{3}{8}$
(8) $-13$
(2) $-4$
(3) $\frac{2}{7}$
(4) $-\frac{9}{2}$
(5) $1$
(6) $-\frac{50}{3}$
(7) $\frac{3}{8}$
(8) $-13$
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