1. 直接写出得数。(每题0.5分,共20分)
45÷45=
85+26=
120÷240=
2.15×4=
1.2−0.8=
540÷90=
20%÷10%=
21.9−60%=
2.7+3.4=
0.04÷2=
368−39=
148%+19%=
609÷3=
50%×400%=
8.1−2.6=
400×15=
24%÷2%=
6.8÷4=
216−199=
564%+1.36=
3.6×$\frac{1}{9}$=
$\frac{22}{15}$−$\frac{16}{15}$=
$\frac{4}{11}$×$\frac{1}{8}$=
$\frac{1}{5}$+$\frac{2}{5}$=
$\frac{1}{21}$×$\frac{7}{2}$=
10÷$\frac{2}{3}$=
0×$\frac{7}{35}$=
15÷$\frac{5}{7}$=
28÷$\frac{14}{9}$=
$\frac{7}{20}$×$\frac{5}{7}$=
$\frac{1}{4}$+$\frac{2}{9}$=
$\frac{4}{7}$−$\frac{1}{5}$=
5.3+1.2+4.7=
$\frac{4}{7}$×$\frac{1}{5}$×35=
320%÷20%÷2=
45×$(\frac{1}{5}−\frac{1}{9})$=
14×$\frac{2}{7}$−3=
84−26−24=
$\frac{4}{9}$×$\frac{1}{5}$÷$\frac{4}{9}$=
52−32−18=

1. $1$ $111$ $\frac{1}{2}$ $8.6$
$0.4$ $6$ $2$ $21.3$
$6.1$ $0.02$ $329$ $167\%$
$203$ $2$ $5.5$ $6000$
$12$ $1.7$ $17$ $7$
$\frac{2}{5}$ $\frac{2}{5}$ $\frac{1}{22}$ $\frac{3}{5}$
$\frac{1}{6}$ $15$ $0$ $21$
$18$ $\frac{1}{4}$ $\frac{17}{36}$ $\frac{13}{35}$
$11.2$ $4$ $8$ $4$
$1$ $34$ $\frac{1}{5}$ $2$

2. 计算下面各题。(每题4分,共36分)
1.25×0.32×2.5
13.45 - $\frac{5}{8}$ +6.55 - $\frac{3}{8}$
45×99 +45
$\frac{2}{9} ÷ [ \frac{7}{36} ÷ ( \frac{5}{6} - \frac{1}{4} ) ]$
$\frac{5}{8} ×25 × \frac{24}{5} ×4$
$\frac{5}{6} × \frac{9}{8} - \frac{1}{6} × \frac{5}{8}$
$\frac{4}{9} ÷ [ \frac{4}{5} - ( \frac{1}{5} + \frac{1}{3} ) ]$
12.5%×4.3×80
62.5%×$\frac{7}{15}$ + $\frac{7}{15} ÷ \frac{8}{3}$

2. $1$ $19$ $4500$
$\frac{2}{3}$ $300$ $\frac{5}{6}$
$\frac{5}{3}$ $43$ $\frac{7}{15}$