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一、口算。
$\frac{7}{27}÷\frac{14}{15}=$
$2.5×1.2=$
$25.4+26=$
$75\%×\frac{4}{3}=$
$\frac{4}{5}-\frac{1}{3}=$
$\frac{3}{4}×\frac{44}{47}=$
$0.02+2.88=$
$\frac{7}{27}÷\frac{14}{15}=$
$\dfrac{5}{18}$
$\frac{7}{10}×\frac{5}{49}=$$\dfrac{1}{14}$
$\frac{2}{5}+\frac{4}{7}=$$\dfrac{34}{35}$
$2.5×1.2=$
3
$4.6-2.09=$2.51
$0.49÷0.7=$0.7
$25.4+26=$
51.4
$3-\frac{7}{10}=$$2\dfrac{3}{10}$
$\frac{1}{9}×\frac{5}{6}=$$\dfrac{5}{54}$
$75\%×\frac{4}{3}=$
1
$\frac{1}{2}-\frac{5}{13}=$$\dfrac{3}{26}$
$\frac{8}{11}÷\frac{4}{33}=$6
$\frac{4}{5}-\frac{1}{3}=$
$\dfrac{7}{15}$
$0.04×400=$16
$6.75-0.8=$5.95
$\frac{3}{4}×\frac{44}{47}=$
$\dfrac{33}{47}$
$1.25÷2.5=$0.5
$\frac{7}{16}+\frac{5}{24}=$$\dfrac{31}{48}$
$0.02+2.88=$
2.9
$0.4-20\%=$0.2
$\frac{6}{7}÷\frac{12}{13}=$$\dfrac{13}{14}$
答案
一、$\dfrac{5}{18}$ $\dfrac{1}{14}$ $\dfrac{34}{35}$
3 2.51 0.7
51.4 $2\dfrac{3}{10}$ $\dfrac{5}{54}$
1 $\dfrac{3}{26}$ 6
$\dfrac{7}{15}$ 16 5.95
$\dfrac{33}{47}$ 0.5 $\dfrac{31}{48}$
2.9 0.2 $\dfrac{13}{14}$
3 2.51 0.7
51.4 $2\dfrac{3}{10}$ $\dfrac{5}{54}$
1 $\dfrac{3}{26}$ 6
$\dfrac{7}{15}$ 16 5.95
$\dfrac{33}{47}$ 0.5 $\dfrac{31}{48}$
2.9 0.2 $\dfrac{13}{14}$
二、计算下面各题，怎样简便就怎样计算。
$3.6÷0.75-0.4$ $\frac{25}{36}×\frac{5}{6}+\frac{11}{36}÷120\%$ $(\frac{4}{9}+\frac{5}{12}-\frac{7}{18})÷\frac{1}{36}$
$72÷\frac{8}{9}×2-29$ $48×\frac{2}{3}×5×\frac{1}{8}$ $(0.9+0.9+0.9+0.9)×2.5$
$3.6÷0.75-0.4$ $\frac{25}{36}×\frac{5}{6}+\frac{11}{36}÷120\%$ $(\frac{4}{9}+\frac{5}{12}-\frac{7}{18})÷\frac{1}{36}$
$72÷\frac{8}{9}×2-29$ $48×\frac{2}{3}×5×\frac{1}{8}$ $(0.9+0.9+0.9+0.9)×2.5$
答案
二、4.4 $\dfrac{5}{6}$ 17
133 20 9
133 20 9
