登录
1. 直接写出得数。
$15 + 1.5 =$
$6.3 + 1.8 =$
$3.6 + 6.34 =$
$9.8 - 2.28 - 6.72 =$
$7.6 - 0.9 =$
$3 ÷ 0.6 =$
$0.8 ÷ 0.25 =$
$17.6 + 2.4 ÷ 0.3 =$
$0.81 × 10 =$
$3.6 × 0.1 =$
$75 ÷ 2.5 =$
$4.3 + 4.29 - 0.21 =$
$2.1 ÷ 0.7 =$
$2.5 × 0.2 =$
$3.5 × 0.2 =$
$3.21 × 101 - 3.21 =$
$\frac{1}{8} × \frac{3}{4} =$
$\frac{7}{16} + \frac{3}{4} =$
$\frac{5}{8} ÷ \frac{5}{7} =$
$\frac{3}{7} + \frac{4}{7} × 3 =$
$\frac{15}{16} × \frac{4}{5} =$
$\frac{4}{5} - \frac{7}{10} =$
$\frac{11}{17} × \frac{33}{55} =$
$80 × (1 + \frac{1}{5}) =$
$\frac{5}{8} ÷ \frac{3}{2} =$
$9 × \frac{5}{9} =$
$\frac{10}{9} ÷ \frac{100}{9} =$
$\frac{1}{24} ÷ (\frac{1}{4} - \frac{1}{6}) =$
$\frac{8}{9} ÷ \frac{2}{9} =$
$\frac{87}{7} ÷ \frac{29}{14} =$
$\frac{6}{5} × \frac{25}{48} =$
$1 ÷ \frac{1}{5} - \frac{1}{5} ÷ 1 =$
$15 + 1.5 =$
$6.3 + 1.8 =$
$3.6 + 6.34 =$
$9.8 - 2.28 - 6.72 =$
$7.6 - 0.9 =$
$3 ÷ 0.6 =$
$0.8 ÷ 0.25 =$
$17.6 + 2.4 ÷ 0.3 =$
$0.81 × 10 =$
$3.6 × 0.1 =$
$75 ÷ 2.5 =$
$4.3 + 4.29 - 0.21 =$
$2.1 ÷ 0.7 =$
$2.5 × 0.2 =$
$3.5 × 0.2 =$
$3.21 × 101 - 3.21 =$
$\frac{1}{8} × \frac{3}{4} =$
$\frac{7}{16} + \frac{3}{4} =$
$\frac{5}{8} ÷ \frac{5}{7} =$
$\frac{3}{7} + \frac{4}{7} × 3 =$
$\frac{15}{16} × \frac{4}{5} =$
$\frac{4}{5} - \frac{7}{10} =$
$\frac{11}{17} × \frac{33}{55} =$
$80 × (1 + \frac{1}{5}) =$
$\frac{5}{8} ÷ \frac{3}{2} =$
$9 × \frac{5}{9} =$
$\frac{10}{9} ÷ \frac{100}{9} =$
$\frac{1}{24} ÷ (\frac{1}{4} - \frac{1}{6}) =$
$\frac{8}{9} ÷ \frac{2}{9} =$
$\frac{87}{7} ÷ \frac{29}{14} =$
$\frac{6}{5} × \frac{25}{48} =$
$1 ÷ \frac{1}{5} - \frac{1}{5} ÷ 1 =$
答案
1. $15 + 1.5 = 16.5$
$6.3 + 1.8 = 8.1$
$3.6 + 6.34 = 9.94$
$9.8 - 2.28 - 6.72 = 0.8$
$7.6 - 0.9 = 6.7$
$3 ÷ 0.6 = 5$
$0.8 ÷ 0.25 = 3.2$
$17.6 + 2.4 ÷ 0.3 = 25.6$
$0.81 × 10 = 8.1$
$3.6 × 0.1 = 0.36$
$75 ÷ 2.5 = 30$
$4.3 + 4.29 - 0.21 = 8.38$
$2.1 ÷ 0.7 = 3$
$2.5 × 0.2 = 0.5$
$3.5 × 0.2 = 0.7$
$3.21 × 101 - 3.21 = 321$
$\frac{1}{8} × \frac{3}{4} = \frac{3}{32}$
$\frac{7}{16} + \frac{3}{4} = \frac{19}{16}$
$\frac{5}{8} ÷ \frac{5}{7} = \frac{7}{8}$
$\frac{3}{7} + \frac{4}{7} × 3 = \frac{15}{7}$
$\frac{15}{16} × \frac{4}{5} = \frac{3}{4}$
$\frac{4}{5} - \frac{7}{10} = \frac{1}{10}$
$\frac{11}{17} × \frac{33}{55} = \frac{33}{85}$
$80 × (1 + \frac{1}{5}) = 96$
$\frac{5}{8} ÷ \frac{3}{2} = \frac{5}{12}$
$9 × \frac{5}{9} = 5$
$\frac{10}{9} ÷ \frac{100}{9} = \frac{1}{10}$
$\frac{1}{24} ÷ (\frac{1}{4} - \frac{1}{6}) = \frac{1}{2}$
$\frac{8}{9} ÷ \frac{2}{9} = 4$
$\frac{87}{7} ÷ \frac{29}{14} = 6$
$\frac{6}{5} × \frac{25}{48} = \frac{5}{8}$
$1 ÷ \frac{1}{5} - \frac{1}{5} ÷ 1 = 4\frac{4}{5}$
$6.3 + 1.8 = 8.1$
$3.6 + 6.34 = 9.94$
$9.8 - 2.28 - 6.72 = 0.8$
$7.6 - 0.9 = 6.7$
$3 ÷ 0.6 = 5$
$0.8 ÷ 0.25 = 3.2$
$17.6 + 2.4 ÷ 0.3 = 25.6$
$0.81 × 10 = 8.1$
$3.6 × 0.1 = 0.36$
$75 ÷ 2.5 = 30$
$4.3 + 4.29 - 0.21 = 8.38$
$2.1 ÷ 0.7 = 3$
$2.5 × 0.2 = 0.5$
$3.5 × 0.2 = 0.7$
$3.21 × 101 - 3.21 = 321$
$\frac{1}{8} × \frac{3}{4} = \frac{3}{32}$
$\frac{7}{16} + \frac{3}{4} = \frac{19}{16}$
$\frac{5}{8} ÷ \frac{5}{7} = \frac{7}{8}$
$\frac{3}{7} + \frac{4}{7} × 3 = \frac{15}{7}$
$\frac{15}{16} × \frac{4}{5} = \frac{3}{4}$
$\frac{4}{5} - \frac{7}{10} = \frac{1}{10}$
$\frac{11}{17} × \frac{33}{55} = \frac{33}{85}$
$80 × (1 + \frac{1}{5}) = 96$
$\frac{5}{8} ÷ \frac{3}{2} = \frac{5}{12}$
$9 × \frac{5}{9} = 5$
$\frac{10}{9} ÷ \frac{100}{9} = \frac{1}{10}$
$\frac{1}{24} ÷ (\frac{1}{4} - \frac{1}{6}) = \frac{1}{2}$
$\frac{8}{9} ÷ \frac{2}{9} = 4$
$\frac{87}{7} ÷ \frac{29}{14} = 6$
$\frac{6}{5} × \frac{25}{48} = \frac{5}{8}$
$1 ÷ \frac{1}{5} - \frac{1}{5} ÷ 1 = 4\frac{4}{5}$
2. 计算下面各题，怎样算简便就怎样算。
$0.6×(5.4 - 4.37)÷0.3$
$18 - (5.75×1.4 + 6.5)$
$1.35×8.4 - 0.35×8.4$
$(\frac{3}{7} + \frac{5}{8})÷\frac{1}{56}$
$[1 - (\frac{1}{4} + \frac{1}{8})]÷\frac{5}{4}$
$\frac{33}{20}÷[\frac{4}{3} - (\frac{9}{10} + \frac{1}{10})]$
$0.6×(5.4 - 4.37)÷0.3$
$18 - (5.75×1.4 + 6.5)$
$1.35×8.4 - 0.35×8.4$
$(\frac{3}{7} + \frac{5}{8})÷\frac{1}{56}$
$[1 - (\frac{1}{4} + \frac{1}{8})]÷\frac{5}{4}$
$\frac{33}{20}÷[\frac{4}{3} - (\frac{9}{10} + \frac{1}{10})]$
答案
2. $0.6×(5.4 - 4.37)÷0.3 = 2.06$
$18 - (5.75×1.4 + 6.5) = 3.45$
$1.35×8.4 - 0.35×8.4 = 8.4$
$(\frac{3}{7} + \frac{5}{8})÷\frac{1}{56} = 59$
$[1 - (\frac{1}{4} + \frac{1}{8})]÷\frac{5}{4} = \frac{1}{2}$
$\frac{33}{20}÷[\frac{4}{3} - (\frac{9}{10} + \frac{1}{10})] = \frac{99}{20}$
$18 - (5.75×1.4 + 6.5) = 3.45$
$1.35×8.4 - 0.35×8.4 = 8.4$
$(\frac{3}{7} + \frac{5}{8})÷\frac{1}{56} = 59$
$[1 - (\frac{1}{4} + \frac{1}{8})]÷\frac{5}{4} = \frac{1}{2}$
$\frac{33}{20}÷[\frac{4}{3} - (\frac{9}{10} + \frac{1}{10})] = \frac{99}{20}$
已知$\frac{3}{16} × ( \frac{1}{2} + \frac{1}{3} ÷ □ ) = \frac{11}{32}$，则$□$里的数应是（
$\frac{1}{4}$
）。答案
$\frac{1}{4}$
