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第85頁

信息發(fā)布者：

2625

0.91

3.15

0.5

?$\frac {7}{6}$?

?$\frac {13}{15}$?

?$6\frac {3}{5}$?

?$\frac {4}{3}$?

2970000500

3000000000

8.05

0.15

60

125

20

5

0.4

?$\frac {2}{5}$?

8

$ ?=\frac {5}{12}×\frac {1}{13}－\frac {1}{4}×\frac {1}{13}?$

$ ?=\frac {1}{13}×(\frac {5}{12}－\frac {1}{4})?$

$ ?=\frac {1}{13}×\frac {1}{6}?$

$ ?=\frac {1}{78}?$

$ ?=(3.35×2)×99+6.7×1?$

$ ?=6.7×99+6.7×1?$

$ ?=6.7×(99+1)?$

$ ?=670?$

?$=36÷(\frac {1}{2}×3)$?

?$=36÷\frac {3}{2}$?

?$=36×\frac {2}{3}$?

?$=24$?

?$\begin{aligned}解：0.25x&=1.25×0.8×2\\0.25x&=2\\x&=2÷0.25\\x&=8\end{aligned}$?

?$\begin{aligned}解：2x&=\frac {4}{9}\\x&=\frac {4}{9}÷2\\x&=\frac {2}{9}\end{aligned}$?

?$\begin{aligned}解：3.2x&=52+12\\3.2x&=64\\x&=64÷3.2\\x&=20\end{aligned}$?

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