登录
1. 直接写出得数。
$6.4 + 3.6 =$
$0.01 ÷ \frac{1}{2} =$
$0.72 ÷ 6 =$
$8 - 0.8 + 12 =$
$0.9 ÷ 0.03 =$
$7.2 - 2 =$
$10 - 1.55 =$
$0.7 + 0.7 ÷ 0.7 =$
$3.1 ÷ 0.31 =$
$1.32 + 8 =$
$7.2 ÷ 40 =$
$1.2 - 2.4 ÷ 2 =$
$1 - 0.06 =$
$0.8 ÷ 1.6 =$
$2.2 × 0.5 =$
$4.8 ÷ (0.5 × 2) =$
$\frac{3}{2} + \frac{2}{5} =$
$\frac{8}{9} × 0.75 =$
$\frac{11}{15} + \frac{7}{15} =$
$9 × \frac{2}{3} × \frac{2}{3} =$
$\frac{9}{5} ÷ \frac{2}{5} =$
$1 - \frac{1}{11} =$
$40 × \frac{7}{8} =$
$16 × (1 - \frac{7}{8}) =$
$\frac{2}{3} ÷ 12 =$
$2 ÷ \frac{3}{8} =$
$\frac{3}{4} × \frac{24}{25} =$
$22 × \frac{12}{11} ÷ \frac{3}{4} =$
$\frac{3}{4} × \frac{6}{11} =$
$0.3 × \frac{5}{9} =$
$\frac{8}{15} ÷ \frac{2}{9} =$
$5.6 - \frac{2}{5} - \frac{8}{5} =$
$6.4 + 3.6 =$
$0.01 ÷ \frac{1}{2} =$
$0.72 ÷ 6 =$
$8 - 0.8 + 12 =$
$0.9 ÷ 0.03 =$
$7.2 - 2 =$
$10 - 1.55 =$
$0.7 + 0.7 ÷ 0.7 =$
$3.1 ÷ 0.31 =$
$1.32 + 8 =$
$7.2 ÷ 40 =$
$1.2 - 2.4 ÷ 2 =$
$1 - 0.06 =$
$0.8 ÷ 1.6 =$
$2.2 × 0.5 =$
$4.8 ÷ (0.5 × 2) =$
$\frac{3}{2} + \frac{2}{5} =$
$\frac{8}{9} × 0.75 =$
$\frac{11}{15} + \frac{7}{15} =$
$9 × \frac{2}{3} × \frac{2}{3} =$
$\frac{9}{5} ÷ \frac{2}{5} =$
$1 - \frac{1}{11} =$
$40 × \frac{7}{8} =$
$16 × (1 - \frac{7}{8}) =$
$\frac{2}{3} ÷ 12 =$
$2 ÷ \frac{3}{8} =$
$\frac{3}{4} × \frac{24}{25} =$
$22 × \frac{12}{11} ÷ \frac{3}{4} =$
$\frac{3}{4} × \frac{6}{11} =$
$0.3 × \frac{5}{9} =$
$\frac{8}{15} ÷ \frac{2}{9} =$
$5.6 - \frac{2}{5} - \frac{8}{5} =$
答案
1. $6.4 + 3.6 = 10$
$0.01 ÷ \frac{1}{2} = 0.02$
$0.72 ÷ 6 = 0.12$
$8 - 0.8 + 12 = 19.2$
$0.9 ÷ 0.03 = 30$
$7.2 - 2 = 5.2$
$10 - 1.55 = 8.45$
$0.7 + 0.7 ÷ 0.7 = 1.7$
$3.1 ÷ 0.31 = 10$
$1.32 + 8 = 9.32$
$7.2 ÷ 40 = 0.18$
$1.2 - 2.4 ÷ 2 = 0$
$1 - 0.06 = 0.94$
$0.8 ÷ 1.6 = 0.5$
$2.2 × 0.5 = 1.1$
$4.8 ÷ (0.5 × 2) = 4.8$
$\frac{3}{2} + \frac{2}{5} = \frac{19}{10}$
$\frac{8}{9} × 0.75 = \frac{2}{3}$
$\frac{11}{15} + \frac{7}{15} = \frac{6}{5}$
$9 × \frac{2}{3} × \frac{2}{3} = 4$
$\frac{9}{5} ÷ \frac{2}{5} = \frac{9}{2}$
$1 - \frac{1}{11} = \frac{10}{11}$
$40 × \frac{7}{8} = 35$
$16 × (1 - \frac{7}{8}) = 2$
$\frac{2}{3} ÷ 12 = \frac{1}{18}$
$2 ÷ \frac{3}{8} = \frac{16}{3}$
$\frac{3}{4} × \frac{24}{25} = \frac{18}{25}$
$22 × \frac{12}{11} ÷ \frac{3}{4} = 32$
$\frac{3}{4} × \frac{6}{11} = \frac{9}{22}$
$0.3 × \frac{5}{9} = \frac{1}{6}$
$\frac{8}{15} ÷ \frac{2}{9} = \frac{12}{5}$
$5.6 - \frac{2}{5} - \frac{8}{5} = 3.6$
$0.01 ÷ \frac{1}{2} = 0.02$
$0.72 ÷ 6 = 0.12$
$8 - 0.8 + 12 = 19.2$
$0.9 ÷ 0.03 = 30$
$7.2 - 2 = 5.2$
$10 - 1.55 = 8.45$
$0.7 + 0.7 ÷ 0.7 = 1.7$
$3.1 ÷ 0.31 = 10$
$1.32 + 8 = 9.32$
$7.2 ÷ 40 = 0.18$
$1.2 - 2.4 ÷ 2 = 0$
$1 - 0.06 = 0.94$
$0.8 ÷ 1.6 = 0.5$
$2.2 × 0.5 = 1.1$
$4.8 ÷ (0.5 × 2) = 4.8$
$\frac{3}{2} + \frac{2}{5} = \frac{19}{10}$
$\frac{8}{9} × 0.75 = \frac{2}{3}$
$\frac{11}{15} + \frac{7}{15} = \frac{6}{5}$
$9 × \frac{2}{3} × \frac{2}{3} = 4$
$\frac{9}{5} ÷ \frac{2}{5} = \frac{9}{2}$
$1 - \frac{1}{11} = \frac{10}{11}$
$40 × \frac{7}{8} = 35$
$16 × (1 - \frac{7}{8}) = 2$
$\frac{2}{3} ÷ 12 = \frac{1}{18}$
$2 ÷ \frac{3}{8} = \frac{16}{3}$
$\frac{3}{4} × \frac{24}{25} = \frac{18}{25}$
$22 × \frac{12}{11} ÷ \frac{3}{4} = 32$
$\frac{3}{4} × \frac{6}{11} = \frac{9}{22}$
$0.3 × \frac{5}{9} = \frac{1}{6}$
$\frac{8}{15} ÷ \frac{2}{9} = \frac{12}{5}$
$5.6 - \frac{2}{5} - \frac{8}{5} = 3.6$
2. 计算下面各题，怎样算简便就怎样算。
4.5×19.9
3.76×$\frac{1}{4}$ - 0.49
(2.44 - 1.8)÷0.4×20
$\frac{15}{8}$×$\frac{1}{5}$ + $\frac{3}{5}$÷$\frac{8}{15}$
(16×$\frac{1}{8}$ + 8)÷$\frac{5}{8}$
0.8÷[$\frac{6}{13}$×($\frac{1}{4}$ + $\frac{5}{6}$)]
4.5×19.9
3.76×$\frac{1}{4}$ - 0.49
(2.44 - 1.8)÷0.4×20
$\frac{15}{8}$×$\frac{1}{5}$ + $\frac{3}{5}$÷$\frac{8}{15}$
(16×$\frac{1}{8}$ + 8)÷$\frac{5}{8}$
0.8÷[$\frac{6}{13}$×($\frac{1}{4}$ + $\frac{5}{6}$)]
答案
2. $4.5×19.9 = 89.55$
$3.76×\frac{1}{4} - 0.49 = 0.45$
$(2.44 - 1.8)÷0.4×20 = 32$
$\frac{15}{8}×\frac{1}{5} + \frac{3}{5}÷\frac{8}{15} = \frac{3}{2}$
$(16×\frac{1}{8} + 8)÷\frac{5}{8} = 16$
$0.8÷[\frac{6}{13}×(\frac{1}{4} + \frac{5}{6})] = 1.6$
$3.76×\frac{1}{4} - 0.49 = 0.45$
$(2.44 - 1.8)÷0.4×20 = 32$
$\frac{15}{8}×\frac{1}{5} + \frac{3}{5}÷\frac{8}{15} = \frac{3}{2}$
$(16×\frac{1}{8} + 8)÷\frac{5}{8} = 16$
$0.8÷[\frac{6}{13}×(\frac{1}{4} + \frac{5}{6})] = 1.6$
添上运算符号和括号，使算式成立。（也可以不添上括号）
1.5 1.5 1.5 1.5 1.5=4.5 1.5 1.5 1.5 1.5 1.5=3
1.5 1.5 1.5 1.5 1.5=6
1.5 1.5 1.5 1.5 1.5=4.5 1.5 1.5 1.5 1.5 1.5=3
1.5 1.5 1.5 1.5 1.5=6
答案
答案不唯一，如：
1.5+1.5+1.5+1.5-1.5=4.5
(1.5-1.5)×1.5+1.5+1.5=3
(1.5+1.5)×(1.5+1.5)÷1.5=6
1.5+1.5+1.5+1.5-1.5=4.5
(1.5-1.5)×1.5+1.5+1.5=3
(1.5+1.5)×(1.5+1.5)÷1.5=6
