計算.(1)(23)0+(−1)3+(13)−3÷|−3|.(2)(-27)-15×(-9)20÷(-3)-7.

計算.(1)(23)0+(−1)3+(13)−3÷|−3|.(2)(-27)-15×(-9)20÷(-3)-7.


(1)原式=1-1+27÷3=9;(2)原式=(-3)-45×(-3)40×(-3)7=(-3)-45+40+7=(-3)2=9.



計算:2/15×[(2/3-3/5)÷4/27]過程寫出來,


2/15×[(2/3-3/5)÷4/27]
=2/15×[1/15÷4/27]
=2/15×1/15*27/4
=3/50



15.27+13.27-3.27簡便計算


15.27+13.27-3.27
=15.27+(13.27-3.27)
=15.27+10
=25.27