1、 . 1.计算 -2.5(-4.8)(0.09)(-0.27); (-3)(-5)2; (-3)2-(-6); (-432)-(-43) (-823)-(-82)3(-2)2-(-52)(-1)5+87(-3)(-1)4 -9+5(-6)-(-4)2(-8); 2(-3)3-4(-3)+15 -8+4(-2); 6-(-12)(-3); 3(-4)+(-28)7; (-7)(-5)-90(-15); 1(-1)+04-(-4)(-1);18+32(-2)3-(-4)25 (-12)2(-4)3-2(-1)2n-1; (-2)4+(-4)2(-1)72m(53+35) (6)(7)+(5)(+9
2、) (5)(3 )151 + ( )24 -7+3-6; (-3)(-8)25; (-616)(-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)+1/2 3.(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+2
3、5*3+25 4 3/7 49/9 - 4/3 8/9 15/36 + 1/27 12 5/6 2/9 3 8 5/4 + 1/4 6 3/8 3/8 6 4/7 5/9 + 3/7 5/9 5/2 -( 3/2 + 4/5 ) 5 7/8 + ( 1/8 + 1/9 ) 9 5/6 + 5/6 3/4 8/9 - 1/3 7 5/49 + 3/14 6 ( 1/2 + 2/3 ) 8 4/5 + 8 11/5 31 5/6 5/6 9/7 - ( 2/7 10/21 ) 5/9 18 14 2/7 4/5 25/16 + 2/3 3/4 14 8/7 5/6 12/15 ) 17/32 3/
4、4 9/24 3 2/9 + 1/3 5/7 3/25 + 3/7 3/14 2/3 + 1/6 1/5 2/3 + 5/6 9/22 + 1/11 1/2 5/3 11/5 + 4/3 45 2/3 + 1/3 15 7/19 + 12/19 5/6 1/4 + 3/4 2/3 8/7 21/16 + 1/2 101 1/5 1/5 21 5016040 120-14418+35 347+452-416052 (58+37)(64-95) 95(64-45) 178-14556+42 812-700(9+3111) 85+14(14+20826) 120-36418+35 (58+37)(64-95) (6.8-6.80.55)8.5 0.12 4.80.124.8 (3.21.5+2.5)1.6 6-1.64= 5.38+7.85-5.37= 7.20.8-1.25= 6-1.193-0.43= 6.5(4.8-1.24)= 5.8(3.87-0.13)+4.23.74 32.52-(6+9.7283.2)2.5 (7.1-5.6)0.9-1.15 2.5 5.42.6(3.7-2.9)+0.62 126(12-7.2)-6 1267.2-6 0.681.9+0.321.9 58+370)(64-45) 420+580-642128 136+6(65-34523) 1 / 1