第29页 - 强化拓展卷六年级数学苏教版提优版

$ \frac {5}{9}$

24.3

364

0.8

$ \frac {6}{5}$

$9$

$\frac {2}{7}$

49

$\frac {1}{3}$

$\frac {4}{7}$

$\begin{aligned}解：\frac {4}{6}x+\frac {3}{6}x&=42\\\frac {7}{6}x&=42\\x&=42×\frac {6}{7}\\x&=36\end{aligned}$

$\begin{aligned}解：\frac {1}{5}x&=15\\x&=15÷\frac {1}{5}\\x&=15×5\\x&=75\end{aligned}$

$\begin{aligned}解：4x&=15.2+4.8\\4x&=20\\x&=20÷4\\x&=5\end{aligned}$

$=198－(59+41)$

$=198－100$

$=98$

$=\frac {3}{7}×\frac {5}{11}+\frac {5}{11}×\frac {4}{7}$

$=\frac {5}{11}×(\frac {3}{7}+\frac {4}{7})$

$=\frac {5}{11}×1$

$=\frac {5}{11}$

$=4×8×125$

$=4×(8×125)$

$=4×1000$

$=4000$

$=(9.46+0.54)－(\frac {4}{7}+\frac {3}{7})$

$=10－1$

$=9$

$=\frac {3}{4}×1+\frac {3}{4}×(\frac {2}{3}÷2)$

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

$=\frac {3}{4}×(1+\frac {1}{3})$

$=\frac {3}{4}×\frac {4}{3}$

$=1$

$=\frac {5}{6}+\frac {7}{12}÷\frac {1}{2}$

$=\frac {5}{6}+\frac {7}{12}×2$

$=\frac {5}{6}+\frac {7}{6}$

$=2$