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1、2；(-3)2-(-6)；(-4x32)-(-4x3)(-8-?23)-(-8-?2)3. (-2)2-(-52)x(-1 )5+87-?(-3)x(-1)4. -9+5x(-6)-(-4)2-?(-8)；2x(-3)3-4x(-3)+15. -8+4*2)；6-(-12)-(-3)；3*(-4)+(-28)-?7；(-7)(-5)-90-(-15) ；1 -(-1 )+0-4-(-4)(-1)；18+32-?(-2)3-(-4)2x5.(-12)2-?(-4)3-2x(-1 )2n-1 ；(-2)4+(-4)2*(-1)7) 2m*(53+35).(一6)(一7)+(5)(+9)(-3)x(
2、-8)x25 ；(-616)H-28) ；-100-27 ；2. (1) -2.5+(-1/5)(2) 0.4- (-1/4) +1/6(3) 1/3- (-5/6) +2/3(4) 1/3+ (-1/5) +1+2/3(5) 27-18+ (-7) -32(6) 0.5+ (-1/4) - (-2.75) +1/23. (1) 33.1- (-22.9) + (-10.5)(2) (-8) - (-15) + (-9) - (-12)(3) -2/3+ (-1/6) - (-1/4) -1/2(4)3/5-3/2+(-11/4)+13/4(5) .125*3+125*5+25*3+2543/
3、7 x 49/9 - 4/38/9 x 15/36 + 1 /2712x 5/6 - 2/9 x3 8x 5/4 + 1/46- 3/8 - 3/8 -64/7 x 5/9 + 3/7 x 5/95/2 - ( 3/2 + 4/5 )7 x 5/49 + 3/146 x ( 1/2 + 2/3 )8x4/5 + 8x11/531 x 5/6 - 5/69/7 - ( 2/7-10/21 )5/9 x 18- 14 x 2/74/5 x 25/16 + 2/3 x 3/414 x 8/7 - 5/6 x 12/15 )17/32 - 3/4 x 9/243 x 2/9 + 1/35/7 x 3/
4、25 + 3/73/14 xx 2/3 + 1/61/5 x 2/3 + 5/69/22 + 1/11 4- 1/25/3 x 11/5 + 4/345 x 2/3 + 1/3 x 15 7/19 + 12/19 x 5/6 1/4 + 3/4 - 2/38/7 x 21/16 + 1/2101 x 1/5- 1/5 x 2150 + 160-40120-144-18+35347+45x2-4160-52(58+37) 4- (64-9x5)95- (64-45)85+14x (14+208-26)(58+37) 4- (64-9x5)0.12x 4.8-0.12x4.86-1.6-?4= 5.38+7.85-5.37=6.5x (4.8-1.2x4)=5.8x (3.87-0.13) +4.2x3.74(7.1-5.6) xO.9-1.15 -2.55.4-2.6x C3.7-2.9) +0.62120-36x4-18+35(6.8-6.8x0.55片8.5(3.2x1.5+2.5) -1.67.24-0.8-1.2x5= 6-1.19x3-0.43=32.52- (6+9.728-3.2) x2.512x6- (12-7.2) -612x6-?7.2-60.68x1.9+0.32x1.9
