第57页 - 强化拓展卷六年级数学苏教版提优版

$\frac {8}{15}$

8.1

32

35

$\frac {2}{3}$

0.6

1500

24.7

0.04

1

$\begin{aligned}解：0.6x&=18.6\\x&=18.6÷0.6\\x&=31\end{aligned}$

$\begin{aligned}解：\frac {1}{8}x&=\frac {1}{40}\\x&=\frac {1}{40}×8\\x&=\frac {1}{5}\end{aligned}$

$\begin{aligned}解：\frac {3}{2}x－\frac {1}{4}x&=\frac {3}{4}\\\frac {5}{4}x&=\frac {3}{4}\\x&=\frac {3}{4}×\frac {4}{5}\\x&=\frac {3}{5}\end{aligned}$

$=(\frac {3}{7}+\frac {4}{7})－(\frac {2}{5}+\frac {3}{5})$

$=1－1$

$=0$

$ =\frac {1}{4}×\frac {3}{7}+\frac {4}{7}×\frac {1}{4}$

$ =\frac {1}{4}×(\frac {3}{7}+\frac {4}{7})$

$ =\frac {1}{4}×1$

$ =\frac {1}{4}$

$ =(4×2.5)×(0.8×12.5)$

$ =10×10$

$ =100$

$=(2.9+1.1)÷\frac {4}{5}$

$=4×\frac {5}{4}$

$=5$

$=(49+1)×\frac {48}{49}$

$=48+\frac {48}{49}$

$=48\frac {48}{49}$

$=6×3－\frac {1}{3}×\frac {1}{6}$

$=18－\frac {1}{18}$

$=17\frac {17}{18}$