2026年计算100七年级数学上册苏科版第16页答案
计算:
(1) $-\frac{1}{5} - (-0.6) - (1\frac{2}{15} - 2\frac{3}{10})$;
(2) $2.25 - (-3\frac{3}{4}) - 4\frac{5}{12} -5\frac{3}{8}$;
(3) $-\left| -\frac{2}{3} - (-\frac{3}{2}) \right| - \left| (-\frac{1}{5}) - \frac{2}{5} \right|$;
(4) $9.6 - [ (-2\frac{3}{4}) - (-2\frac{1}{2}) ] - \frac{5}{8}$;
(5) $\frac{5}{6} - (+8\frac{1}{3}) -18.9 - (-9.2)$;
(6) $5.23 -9\frac{1}{3} - (-12\frac{5}{6}) -9.78$;
(7) $2 - \frac{5}{12} - \frac{5}{18} - (-\frac{1}{12}) - \frac{7}{18} -2\frac{8}{17}$;
(8) $3.1 -10.9 - [ (-3\frac{2}{7}) -8\frac{1}{2} - (-7.5) ]$。

答案

(1) $1\frac{17}{30}$
(2) $-3\frac{19}{24}$
(3) $-\frac{43}{30}$
(4) $9\frac{9}{40}$
(5) $-17.2$
(6) $-1.05$
(7) $-1\frac{8}{17}$
(8) $-3\frac{18}{35}$