1. 直接写出得数。
$9÷4.5=$
$4.3×0.1=$
$0.2×3=$
$0.7×10=$
$2.75×0.4=$
$0.09×0.3=$
$1.3×0.2=$
$8×0.6=$
$0.25×80=$
$2.36×40=$
$0.8×2.4=$
$4.8×0.03=$
$25÷\frac{5}{7}=$
$\frac{1}{4}÷\frac{5}{12}=$
$\frac{12}{5}×\frac{7}{24}=$
$\frac{11}{18}×\frac{6}{7}=$
$\frac{7}{5}÷\frac{3}{5}=$
$\frac{15}{16}÷\frac{3}{4}=$

$9÷4.5=2$
$4.3×0.1=0.43$
$0.2×3=0.6$
$0.7×10=7$
$2.75×0.4=1.1$
$0.09×0.3=0.027$
$1.3×0.2=0.26$
$8×0.6=4.8$
$0.25×80=20$
$2.36×40=94.4$
$0.8×2.4=1.92$
$4.8×0.03=0.144$
$25÷\frac{5}{7}=35$
$\frac{1}{4}÷\frac{5}{12}=\frac{3}{5}$
$\frac{12}{5}×\frac{7}{24}=\frac{7}{10}$
$\frac{11}{18}×\frac{6}{7}=\frac{11}{21}$
$\frac{7}{5}÷\frac{3}{5}=\frac{7}{3}$
$\frac{15}{16}÷\frac{3}{4}=\frac{5}{4}$

2. 在○里填上“＞”“＜”或“=”。
$1.03×0.58$ ○ $1.03$
$0.99×0.38$ ○ $0.38$
$1.58×0.99$ ○ $0.99$
$\frac{1}{3}×\frac{7}{6}$ ○ $\frac{7}{6}$
$\frac{13}{15}÷\frac{3}{5}$ ○ $\frac{13}{15}$
$\frac{1}{4}$ ○ $\frac{1}{4}÷\frac{5}{4}$

$1.03×0.58$ ＜ $1.03$
$0.99×0.38$ ＜ $0.38$
$1.58×0.99$ ＞ $0.99$
$\frac{1}{3}×\frac{7}{6}$ ＜ $\frac{7}{6}$
$\frac{13}{15}÷\frac{3}{5}$ ＞ $\frac{13}{15}$
$\frac{1}{4}$ ＞ $\frac{1}{4}÷\frac{5}{4}$

3. 列竖式计算。
1.4×0.58=
3.14×0.36=
1.68÷1.6=

$1.4×0.58=0.812$
$3.14×0.36=1.1304$
$1.68÷1.6=1.05$

4. 递等式计算。
$9.27×1.6 - 1.6×4.27$
$32×1.25$
$\frac{11}{20}÷\frac{9}{2}×\frac{5}{11}$
$6.9×9.9 + 0.69$

$9.27×1.6 - 1.6×4.27=8$
$32×1.25=40$
$\frac{11}{20}÷\frac{9}{2}×\frac{5}{11}=\frac{1}{18}$
$6.9×9.9 + 0.69=69$