1. 直接写出得数。(每题0.5分,共20分)
450-50=
2.4+5.8=
54÷10%=
4×$\frac{7}{16}$=
400÷8=
9.3-0.7=
75×20%=
$\frac{1}{3}$+$\frac{1}{5}$=
30×40=
5.6÷1.4=
0.23+177%=
$\frac{7}{8}$-$\frac{3}{4}$=
73-25=
4.8-2.4=
125%×4=
5÷$\frac{2}{3}$=
58+29=
7.67-3.63=
48×25%=
$\frac{3}{44}$÷$\frac{1}{11}$=
149+58=
0.24×5=
87%-28%=
$\frac{5}{8}$+$\frac{7}{8}$=
5×900=
13.6+6.2=
75%+$\frac{1}{4}$=
$\frac{3}{5}$×15=
110+350=
9÷5=
$\frac{7}{9}$×27%=
$\frac{4}{7}$÷$\frac{7}{4}$=
970-220=
5×1.2=
0.8-40%=
$\frac{1}{8}$-$\frac{1}{9}$=
72÷18=
8.4÷7=
4.5÷9%=
0.9÷$\frac{1}{100}$=

1. $400$ $8.2$ $540$ $\frac{7}{4}$
$50$ $8.6$ $15$ $\frac{8}{15}$
$1200$ $4$ $2$ $\frac{1}{8}$
$48$ $2.4$ $5$ $\frac{15}{2}$
$87$ $4.04$ $12$ $\frac{3}{4}$
$207$ $1.2$ $59\%$ $\frac{3}{2}$
$4500$ $19.8$ $1$ $9$
$460$ $1.8$ $21\%$ $\frac{16}{49}$
$750$ $6$ $0.4$ $\frac{1}{72}$
$4$ $1.2$ $50$ $90$

2. 求比值。(每题4分,共32分)
$\frac{8}{9}:\frac{4}{15}$
$0.125:\frac{3}{8}$
$3:0.75$
2千克：50克
$\frac{5}{7}:20$
$\frac{2}{5}:\frac{2}{25}$
$75\%:25\%$
$\frac{3}{5}:20\%$

2. $\frac{10}{3}$ $\frac{1}{3}$ $4$ $40$
$\frac{1}{28}$ $5$ $3$ $3$