文档介绍:- ×(-) (0×.09) (÷-) ; (-3) ×(-5)
2; (-3)2-(-6) ; (-4 ×32)-(-4 3)× (-8 ÷23)-(-8 2)÷
- ×(-) (0×.09) (÷-) ; (-3) ×(-5)
2; (-3)2-(-6) ; (-4 ×32)-(-4 3)× (-8 ÷23)-(-8 2)÷
3. (-2)2-(-52) (-1)5+87× ÷(-3) ×(-1)
4. -9+5 ×(-6)-(-4)2 (-8)÷; 2×(-3)3-4 (×-3)+1
5. -8+4 ÷(-2) ; 6-(-12) (÷-3) ; 3?(-4)+(-28) 7÷;
(-7)(-5)-90 (-15)÷ ; 1÷(-1)+0 ÷4-(-4)(-1) ;
(-2)4+(- 4)2?(-1)7 〕 2m?(53+35) .
(-6)-(- 7)+(-5)- (+9)
(-5) ×(-3 )-15×1 +〔 -( ) 24×〕
-7+3-6;
(-3) (×-8) 25×; (-616) ÷(-28); -100-27;
2.. (1)-+(-1/5 ) (2) -(-1/4 )+1/6 (3)1/3-(-5/6 )+2/3
(4) 1/3+(-1/5 )+1+2/3 (5)27-18+ (-7)-32
18+32÷(-2)3-(-4)2 5.× (-12)2 ÷(-4)3-2 (×-1)2n-1 ;
(6)+ (-1/4 )-(- )+1/2 8 ×4/5 + 8 11/5× 31 ×5/6 –5/6
3.(1)- (- )+(- ) (2)(-8)-(-15)+(-9)-(-12)
9/7 - ( 2/7 –10/21 ) 5/9 ×18 –14 ×2/7
(3)-2/3+ (-1/6 )-( -1/4 )-1/2 (4)3/5-3/2+(-11/4)+13/4 4/5 ×25/16 + 2/3 3/4× 14 ×8/7 –5/6 ×12/15 )
17/32 –3/4 ×9/24 3 ×2/9 + 1/3
(5).125*3+125*5+25*3+25
4 3/7 ×49/9 - 4/3 8/9 ×15/36 + 1/27 5/7 ×3/25 + 3/7 3/14 ×2/3 + 1/6 1/5 ×2/3 + 5/6
12