1. 直接写出得数。
$1+1\% =$ $2-25\% =$ $100×0.4\% =$ $10\% ×2.5=$ $2.5÷25\% =$
$50\% ×90\% =$ $18×\frac {5}{6}=$ $5÷1\% =$ $\frac {1}{3}-\frac {1}{5}=$ $0×4\% =$
$1+1\% =$ $2-25\% =$ $100×0.4\% =$ $10\% ×2.5=$ $2.5÷25\% =$
$50\% ×90\% =$ $18×\frac {5}{6}=$ $5÷1\% =$ $\frac {1}{3}-\frac {1}{5}=$ $0×4\% =$
答案:
1.01
1.75
0.4
0.25
10
0.45
15
500
$\frac{2}{15}$
0
1.75
0.4
0.25
10
0.45
15
500
$\frac{2}{15}$
0
2. 解方程。
$1+50\% x=1.5$ $x-25\% x=60$ $1.2x+30\% x=45$
$1+50\% x=1.5$ $x-25\% x=60$ $1.2x+30\% x=45$
答案:
2. x=1,x=80,x=30
3. 怎样简便怎样算。
$99\% +99\% ×99$ $4÷80\% -80\% ÷4$ $62.5\% ×\frac {3}{10}+\frac {5}{8}÷\frac {10}{7}$
$48×(75\% +\frac {5}{12}-\frac {2}{3})$ $\frac {3}{4}×93+0.75×7$ $\frac {5}{8}÷[\frac {3}{5}×(\frac {2}{3}-\frac {1}{2})]$
$99\% +99\% ×99$ $4÷80\% -80\% ÷4$ $62.5\% ×\frac {3}{10}+\frac {5}{8}÷\frac {10}{7}$
$48×(75\% +\frac {5}{12}-\frac {2}{3})$ $\frac {3}{4}×93+0.75×7$ $\frac {5}{8}÷[\frac {3}{5}×(\frac {2}{3}-\frac {1}{2})]$
答案:
1.
$99\% + 99\% × 99$
$= 99\% × (1 + 99)$
$= 99\% × 100$
$= 99$
2.
$4 ÷ 80\% - 80\% ÷ 4$
$= 5 - 0.2$
$= 4.8$
3.
$62.5\% × \frac{3}{10} + \frac{5}{8} ÷ \frac{10}{7}$
$= \frac{5}{8} × \frac{3}{10} + \frac{5}{8} × \frac{7}{10}$
$= \frac{5}{8} × (\frac{3}{10} + \frac{7}{10})$
$= \frac{5}{8} × 1$
$= \frac{5}{8}$
4.
$48 × (75\% + \frac{5}{12} - \frac{2}{3})$
$= 48 × (\frac{3}{4} + \frac{5}{12} - \frac{8}{12})$
$= 48 × (\frac{9}{12} + \frac{5}{12} - \frac{8}{12})$
$= 48 × \frac{1}{2}$
$= 24$
5.
$\frac{3}{4} × 93 + 0.75 × 7$
$= 0.75 × 93 + 0.75 × 7$
$= 0.75 × (93 + 7)$
$= 0.75 × 100$
$= 75$
6.
$\frac{5}{8} ÷ [\frac{3}{5} × (\frac{2}{3} - \frac{1}{2})]$
$= \frac{5}{8} ÷ [\frac{3}{5} × \frac{1}{6}]$
$= \frac{5}{8} ÷ \frac{1}{10}$
$= \frac{5}{8} × 10$
$= \frac{25}{4}$
$99\% + 99\% × 99$
$= 99\% × (1 + 99)$
$= 99\% × 100$
$= 99$
2.
$4 ÷ 80\% - 80\% ÷ 4$
$= 5 - 0.2$
$= 4.8$
3.
$62.5\% × \frac{3}{10} + \frac{5}{8} ÷ \frac{10}{7}$
$= \frac{5}{8} × \frac{3}{10} + \frac{5}{8} × \frac{7}{10}$
$= \frac{5}{8} × (\frac{3}{10} + \frac{7}{10})$
$= \frac{5}{8} × 1$
$= \frac{5}{8}$
4.
$48 × (75\% + \frac{5}{12} - \frac{2}{3})$
$= 48 × (\frac{3}{4} + \frac{5}{12} - \frac{8}{12})$
$= 48 × (\frac{9}{12} + \frac{5}{12} - \frac{8}{12})$
$= 48 × \frac{1}{2}$
$= 24$
5.
$\frac{3}{4} × 93 + 0.75 × 7$
$= 0.75 × 93 + 0.75 × 7$
$= 0.75 × (93 + 7)$
$= 0.75 × 100$
$= 75$
6.
$\frac{5}{8} ÷ [\frac{3}{5} × (\frac{2}{3} - \frac{1}{2})]$
$= \frac{5}{8} ÷ [\frac{3}{5} × \frac{1}{6}]$
$= \frac{5}{8} ÷ \frac{1}{10}$
$= \frac{5}{8} × 10$
$= \frac{25}{4}$
1. $\frac {($
2
$)}{5}=($6
$)÷15=0.4=8:($20
$)=($40
$)\% $
答案:
1. 2,6,20,40
2. 在$◯$里填上“>”“<”或“=”。
$1.05◯ 1.5\%$ $\frac {5}{6}◯ 62.5\%$ $0.09◯ 90\%$
$13◯ 130\%$ $\frac {7}{10}◯ 7\%$ $0.1◯ 1\%$
$1.05◯ 1.5\%$ $\frac {5}{6}◯ 62.5\%$ $0.09◯ 90\%$
$13◯ 130\%$ $\frac {7}{10}◯ 7\%$ $0.1◯ 1\%$
答案:
2. >,>,<,>,>,>
查看更多完整答案,请扫码查看