计算:(1)4.7-(-8.9)-7.5+(-6)(2)492425×(-5)(3)(79?216?134)÷(-16)2(4)(-5)×313
计算:(1)4.7-(-8.9)-7.5+(-6)(2)492425×(-5)(3)(79?216?134)÷(-16)2(4)(-5)×313+2×313-6×313(...
计算:(1)4.7-(-8.9)-7.5+(-6)(2)492425×(-5)(3)(79?216?134)÷(-16)2(4)(-5)×313+2×313-6×313(5)(?1)2011?(?22)×(?1)5?36×(?13)2.
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印第安夏87
2015-01-14
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(1)4.7-(-8.9)-7.5+(-6)
=4.7+8.9-7.5-6
=13.6-13.5
=0.1;
(2)49
×(-5)
=(50-
)×(-5)
=50×(-5)-
×(-5)
=-250+
=
?249;
(3)(
?2?1)÷(-
)
2
=(
?2?1)×36
=28-78-63
=-113;
(4)(-5)×3
+2×3
-6×3
=(-5+2-6)×3
=-9×3
=-30;
(5)
(?1)2011?(?22)×(?1)5?36×(?)2=-1-4×1-36×
=-1-4-4
=-9.
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