第60页 - 苏教版数学补充习题六年级上下册答案

$=789+64×13$

$=789+832$

$=1621$

$=720-735÷21$

$=720-35$

$=685$

$=666÷(901-864)$

$=666÷37$

$=18$

$ =909×[720\div 80]$

$ =909×9$

$ =8181$

$ =\frac {2}{3}×\frac {1}{12}$

$ =\frac {1}{18}$

$ =\frac {3}{5}\div [\frac {3}{8}×\frac {2}{3}]$

$ =\frac {3}{5}\div \frac {1}{4}$

$ =\frac {12}{5}$

$ =48+52+169$

$ =100+169$

$ =269$

$ =25×0.4×73$

$ =10×73$

$ =730$

$ =43×(100+2)$

$ =43×100+43×2$

$ =4300+86$

$ =4386$

$ =(\frac {4}{9}+\frac {5}{9})+(\frac {3}{17}+\frac {4}{17})$

$ =1+\frac {7}{17}$

$ =1\frac {7}{17}$

$ =\frac {7}{18}×\frac {5}{4}+\frac {11}{18}×\frac {5}{4}$

$ =(\frac {7}{18}+\frac {11}{18})×\frac {5}{4}$

$ =1×\frac {5}{4}$

$ =\frac {5}{4}$

$ \left(1\right)48+169+52$
$=48+52+169$
$=100+169$
$=269$

$(2)25\times 73\times 0.4$
$=25\times 0.4\times 73$
$=10\times 73$
$=730$

$(3)43\times 102$
$=43\times \left(100+2\right)$
$=43\times 100+43\times 2$
$=4300+86$
$=4386$

$(4)\frac{4}{9}+\frac{3}{17}+\frac{5}{9}+\frac{4}{17}$
$=(\frac{4}{9}+\frac{5}{9})+(\frac{3}{17}+\frac{4}{17})$
$=1+\frac{7}{17}$
$=1\frac{7}{17}$

$(5)\frac{7}{18}\times \frac{5}{4}+\frac{11}{18}\div \frac{4}{5}$
$=\frac{7}{18}\times \frac{5}{4}+\frac{11}{18}\times \frac{5}{4}$
$=(\frac{7}{18}+\frac{11}{18})\times \frac{5}{4}$
$=1\times \frac{5}{4}$
$=\frac{5}{4}$