1. 直接写出得数。(9分)
$8×0.75=$
$\frac{1}{5}+\frac{1}{6}=$
$168-28+32=$
$2.5+1.3=$
$\frac{1}{2}-\frac{1}{8}=$
$1.5×6÷1.5=$
$0.48÷0.06=$
$\frac{3}{10}×\frac{5}{6}=$
$(\frac{1}{24}-\frac{1}{32})÷\frac{1}{8}=$
$8×0.75=$
$\frac{1}{5}+\frac{1}{6}=$
$168-28+32=$
$2.5+1.3=$
$\frac{1}{2}-\frac{1}{8}=$
$1.5×6÷1.5=$
$0.48÷0.06=$
$\frac{3}{10}×\frac{5}{6}=$
$(\frac{1}{24}-\frac{1}{32})÷\frac{1}{8}=$
答案
1. $8×0.75=6$
$\frac{1}{5}+\frac{1}{6}=\frac{11}{30}$
$168-28+32=172$
$2.5+1.3=3.8$
$\frac{1}{2}-\frac{1}{8}=\frac{3}{8}$
$1.5×6÷1.5=6$
$0.48÷0.06=8$
$\frac{3}{10}×\frac{5}{6}=\frac{1}{4}$
$(\frac{1}{24}-\frac{1}{32})÷\frac{1}{8}=\frac{1}{12}$
$\frac{1}{5}+\frac{1}{6}=\frac{11}{30}$
$168-28+32=172$
$2.5+1.3=3.8$
$\frac{1}{2}-\frac{1}{8}=\frac{3}{8}$
$1.5×6÷1.5=6$
$0.48÷0.06=8$
$\frac{3}{10}×\frac{5}{6}=\frac{1}{4}$
$(\frac{1}{24}-\frac{1}{32})÷\frac{1}{8}=\frac{1}{12}$
2. 用竖式计算,带*的要验算。(9分)
43.65+8.1=
3. 2−0.19=
3.4×2.07≈
(得数保留两位小数)
2.8÷1.3≈
(得数保留两位小数)
43.65+8.1=
3. 2−0.19=
3.4×2.07≈
(得数保留两位小数)
2.8÷1.3≈
(得数保留两位小数)
答案
2. $43.65+8.1=51.75$
$3.2-0.19=3.01$
$3.4×2.07≈7.04$
$2.8÷1.3≈2.15$
竖式及验算略
$3.2-0.19=3.01$
$3.4×2.07≈7.04$
$2.8÷1.3≈2.15$
竖式及验算略
3. 计算下面各题,能简算的要简算。(12 分)
$10.32 - 3.8 - 6.2 - 0.32$
$\frac{11}{8} + \frac{2}{5} - \frac{3}{8} + \frac{3}{5}$
$14×(5.2 - 2.7)×\frac{1}{5}$
$\frac{7}{11}×(\frac{2}{5} + \frac{3}{7})÷0.4$
$10.32 - 3.8 - 6.2 - 0.32$
$\frac{11}{8} + \frac{2}{5} - \frac{3}{8} + \frac{3}{5}$
$14×(5.2 - 2.7)×\frac{1}{5}$
$\frac{7}{11}×(\frac{2}{5} + \frac{3}{7})÷0.4$
答案
3. $10.32 - 3.8 - 6.2 - 0.32=0$
$\frac{11}{8} + \frac{2}{5} - \frac{3}{8} + \frac{3}{5}=2$
$14×(5.2 - 2.7)×\frac{1}{5}=7$
$\frac{7}{11}×(\frac{2}{5} + \frac{3}{7})÷0.4=\frac{29}{22}$
$\frac{11}{8} + \frac{2}{5} - \frac{3}{8} + \frac{3}{5}=2$
$14×(5.2 - 2.7)×\frac{1}{5}=7$
$\frac{7}{11}×(\frac{2}{5} + \frac{3}{7})÷0.4=\frac{29}{22}$
1. $40.3=(\ )×403=(\ )×4+(\ )×3$,它是由$(\ )$个十和$(\ )$个十分之一组成的,它里面有$(\ )$个十分之一。
答案
1. 0.1 10 0.1 4 3 403
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