一、直接写出得数。(共 32 分)
$17+23=$ $0.18÷0.9=$ $1.6÷2=$ $1.8÷4÷0.5=$
$2.8÷0.7=$ $3.4×0.4=$ $6.3-0.03=$ $8×2.5×0.6=$
$825-325=$ $8-7.36=$ $3.2×50=$ $10-0.5×4=$
$60×0.03=$ $0.5÷100=$ $1.65+2.75=$ $16-4.5-5.5=$
$\frac{4}{7}÷\frac{8}{21}=$ $\frac{6}{7}÷\frac{4}{9}=$ $\frac{5}{8}×\frac{3}{4}=$ $3÷\frac{3}{5}-\frac{3}{5}=$
$\frac{7}{6}÷\frac{5}{8}=$ $\frac{5}{8}×\frac{2}{3}=$ $\frac{5}{18}÷0.1=$ $6÷(\frac{4}{5}×\frac{2}{5})=$
$\frac{9}{7}×\frac{21}{8}=$ $\frac{4}{11}×1.1=$ $1.25+\frac{3}{4}=$ $\frac{2}{7}×7÷\frac{2}{7}=$
$1.6×\frac{4}{5}=$ $70×\frac{2}{15}=$ $\frac{4}{5}÷16=$ $0.46÷2×\frac{1}{10}=$
$17+23=$ $0.18÷0.9=$ $1.6÷2=$ $1.8÷4÷0.5=$
$2.8÷0.7=$ $3.4×0.4=$ $6.3-0.03=$ $8×2.5×0.6=$
$825-325=$ $8-7.36=$ $3.2×50=$ $10-0.5×4=$
$60×0.03=$ $0.5÷100=$ $1.65+2.75=$ $16-4.5-5.5=$
$\frac{4}{7}÷\frac{8}{21}=$ $\frac{6}{7}÷\frac{4}{9}=$ $\frac{5}{8}×\frac{3}{4}=$ $3÷\frac{3}{5}-\frac{3}{5}=$
$\frac{7}{6}÷\frac{5}{8}=$ $\frac{5}{8}×\frac{2}{3}=$ $\frac{5}{18}÷0.1=$ $6÷(\frac{4}{5}×\frac{2}{5})=$
$\frac{9}{7}×\frac{21}{8}=$ $\frac{4}{11}×1.1=$ $1.25+\frac{3}{4}=$ $\frac{2}{7}×7÷\frac{2}{7}=$
$1.6×\frac{4}{5}=$ $70×\frac{2}{15}=$ $\frac{4}{5}÷16=$ $0.46÷2×\frac{1}{10}=$
答案
40 0.2 0.8 0.9
4 1.36 6.27 12
500 0.64 160 8
1.8 0.005 4.4 6
$\frac{3}{2}$ $\frac{27}{14}$ $\frac{15}{32}$ $4\frac{2}{5}$
$\frac{28}{15}$ $\frac{5}{12}$ $\frac{25}{9}$ $\frac{75}{4}$
$\frac{27}{8}$ 0.4 2 7
$\frac{32}{25}$ $\frac{28}{3}$ $\frac{1}{20}$ 0.023
4 1.36 6.27 12
500 0.64 160 8
1.8 0.005 4.4 6
$\frac{3}{2}$ $\frac{27}{14}$ $\frac{15}{32}$ $4\frac{2}{5}$
$\frac{28}{15}$ $\frac{5}{12}$ $\frac{25}{9}$ $\frac{75}{4}$
$\frac{27}{8}$ 0.4 2 7
$\frac{32}{25}$ $\frac{28}{3}$ $\frac{1}{20}$ 0.023
二、用竖式计算,带☆的要验算。(共20分)
13.6×6.7=
☆3.572÷0.47=
7.79÷3.2≈
(得数保留一位小数)
☆3.78÷1.5=
0.58×0.605=
5.08×0.64≈
(得数保留两位小数)
13.6×6.7=
☆3.572÷0.47=
7.79÷3.2≈
(得数保留一位小数)
☆3.78÷1.5=
0.58×0.605=
5.08×0.64≈
(得数保留两位小数)
答案
91.12 7.6 2.4
2.52 0.3509 3.25
竖式及验算略
2.52 0.3509 3.25
竖式及验算略
三、计算下面各题,怎样算简便就怎样算。(共24分)
$21.6 - 0.2 × 4 × 20$
$10.8 ÷ 0.125 ÷ 1.8 ÷ 8$
$(2.79 ÷ 0.9 + 4.79) ÷ 0.3$
$\frac{22}{13} - 1.5 × \frac{3}{10} - \frac{11}{20}$
$( \frac{5}{6} + \frac{7}{8} - \frac{11}{12} ) ÷ \frac{1}{24}$
$1 ÷ [ \frac{2}{3} × ( \frac{3}{2} - \frac{3}{10} ) ]$
$21.6 - 0.2 × 4 × 20$
$10.8 ÷ 0.125 ÷ 1.8 ÷ 8$
$(2.79 ÷ 0.9 + 4.79) ÷ 0.3$
$\frac{22}{13} - 1.5 × \frac{3}{10} - \frac{11}{20}$
$( \frac{5}{6} + \frac{7}{8} - \frac{11}{12} ) ÷ \frac{1}{24}$
$1 ÷ [ \frac{2}{3} × ( \frac{3}{2} - \frac{3}{10} ) ]$
答案
5.6 6 26.3
$\frac{9}{13}$ 19 $\frac{5}{4}$
$\frac{9}{13}$ 19 $\frac{5}{4}$
登录