问题
解答题
计算(1)3
(2)(-3)2+(-2)3×(-
(3)(-1)5×[4
(4)-14-(1-0.5)×
(5)(-
(6)26-(-5)×(-7). |
答案
(1)3
-15 6
+53 4
+31 6
=33 4
+55 6
-11 6
+33 4
=9+2=11;3 4
(2)(-3)2+(-2)3×(-
)÷(-1 4
)=9+(-8)×(-1 2
)×(-2)=9-4=5;1 4
(3)(-1)5×[4
÷(-4)+(-2 3
)×(-0.4)]÷(-1 4
)=-1×(-1 3
×14 3
+1 4
×1 4
)×(-3)=-(-4 10
)×(-3)=-1 15
;1 5
(4)-14-(1-0.5)×
×[2-(-3)2]=-1-1 3
×1 2
×(-7)=-1+1 3
=7 6
;1 6
(5)(-
+2 3
)×24-3.95×6-1.45×6=-16+20-6×(3.95+1.45)=4-6×5.4=4-32.4=-28.4;5 6
(6)26-(-5)×(-7)=26-35=-9.