计算:(1)(-12)-5+(-14)-(-39)(2)-3 2 ÷(-3) 2 +3×(-2)+|-4|(3)[ (- 1 6 )-(
计算:(1)(-12)-5+(-14)-(-39)(2)-32÷(-3)2+3×(-2)+|-4|(3)[(-16)-(-512)+215]×(-60)(4)-45×[(...
计算:(1)(-12)-5+(-14)-(-39)(2)-3 2 ÷(-3) 2 +3×(-2)+|-4|(3)[ (- 1 6 )-(- 5 12 )+ 2 15 ]×(-60)(4) - 4 5 ×[(- 1 2 )÷(0.75-1)+ (-2) 5 ] .
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(1)(-12)-5+(-14)-(-39) =-12-5-14+39 =-31+39 =8; (2)-3 2 ÷(-3) 2 +3×(-2)+|-4| =-9÷9-6+4 =-1-6+4 =-3; (3)[ (-
=
=10-25-8 =-23; (4) -
=-
=-
=-
=24. |
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