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第19頁

信息發(fā)布者：

141.28+(-27.64)+(-5)+84+(-16.8)+(-31.09)+125.7=270.45(萬元)

答：合計本周收入270.45萬元。

-8或-2

0

=

1.8

251.8

-180

-1

-q

?$=-4\frac {1}{6}+8\frac {2}{5}-8\frac {1}{5}-2\frac {5}{6}-1\frac {3}{5}$?

?$=-(4 \frac {1}{6}+2 \frac {5}{6})+(8 \frac {2}{5}-8 \frac {1}{5}-1 \frac {3}{5})$?

?$=-7-1 \frac {2}{5}$?

?$=-8\frac {2}{5}$?

?$=4.5-2.5+9\frac {1}{3}-15\frac {2}{3}+2\frac {1}{3}$?

?$=(4.5-2.5)-(15 \frac {2}{3}-9 \frac {1}{3}-2 \frac {1}{3})$?

?$=2-4$?

?$=-2$?

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