1. 直接写出得数。(28☆)
$7×13\%=$
$1-37.5\%=$
$3.6\%+15\%=$
$1+20\%=$
$3.2×40\%=$
$\frac{3}{20}-5\%=$
$0.75-45\%=$
$2.6×50\%=$
$0.3×90\%=$
$\frac{7}{20}÷5\%=$
$50\%×30\%=$
$\frac{1}{4}÷60\%=$
$\frac{9}{2}×2\%=$
$25\%+\frac{1}{8}=$
$36\%×20\%=$
$1+7\%=$
$4×22\%=$
$\frac{1}{3}+20\%=$
$0.2×130\%=$
$1.5-80\%=$
$8.1\%×10=$
$80\%×2=$
$1.73-30\%=$
$4-250\%=$
$1.2×30\%=$
$\frac{4}{5}-38\%=$
$0.25+75\%=$
$\frac{7}{10}-28\%=$

1. $7×13\%=0.91$
$1-37.5\%=0.625$
$3.6\%+15\%=0.186$
$1+20\%=1.2$
$3.2×40\%=1.28$
$\frac{3}{20}-5\%=\frac{1}{10}$
$0.75-45\%=0.3$
$2.6×50\%=1.3$
$0.3×90\%=0.27$
$\frac{7}{20}÷5\%=7$
$50\%×30\%=0.15$
$\frac{1}{4}÷60\%=\frac{5}{12}$
$\frac{9}{2}×2\%=0.09$
$25\%+\frac{1}{8}=0.375$
$36\%×20\%=0.072$
$1+7\%=1.07$
$4×22\%=0.88$
$\frac{1}{3}+20\%=\frac{8}{15}$
$0.2×130\%=0.26$
$1.5-80\%=0.7$
$8.1\%×10=0.81$
$80\%×2=1.6$
$1.73-30\%=1.43$
$4-250\%=1.5$
$1.2×30\%=0.36$
$\frac{4}{5}-38\%=0.42$
$0.25+75\%=1$
$\frac{7}{10}-28\%=0.42$

2. 填一填。(4☆)

2. 盐 盐 盐水 盐水 $\frac{5}{4}$ 300 水

3. 计算下面各题,能简算的要简算。(18☆)
$23 - \frac{8}{9} × 75\% ÷ \frac{1}{27}$
$\frac{5}{9} × 7 + \frac{5}{9} × 11$
$(6 - \frac{1}{8} × 32) × 75\%$
$(\frac{5}{8} + 90\%) × \frac{8}{9}$
$3 ÷ \frac{3}{4} - 75\%$
$(40\% - \frac{1}{3}) ÷ \frac{2}{3}$
用时：分钟 ★共得：☆/50 ☆

3. $23 - \frac{8}{9} × 75\% ÷ \frac{1}{27}=5$
$\frac{5}{9} × 7 + \frac{5}{9} × 11=10$
$(6 - \frac{1}{8} × 32) × 75\%=\frac{3}{2}$
$(\frac{5}{8} + 90\%) × \frac{8}{9}=\frac{61}{45}$
$3 ÷ \frac{3}{4} - 75\%=\frac{13}{4}$
$(40\% - \frac{1}{3}) ÷ \frac{2}{3}=\frac{1}{10}$