5/2 -( 3/2 + 4/5 ) 7/8 + ( 1/8 + 1/9 ) 9/7 - ( 2/7 – 10/21 ) 5/8+5/6+1/9240/400+12/400-150/400186/24+88/24-252/2414/3-(385/42-270/42)/2+1/3-1/4+1/5-1/6=? 3/4-3/5+4/5-4/6+5/6-5/7=? 1/2-1/2-1/2+1/2=? 1/100000+3-32/867=? 1+1/2-1/3=? 2/10+1/25 6/48+4/36 9/72+ 6/ 24 9/7-8/5 2/1+3/2 8/5-6/1 5/3+7/2 6/7-8/3 9/8-6/5 3/2-6/3+5/2-4/3 8/5-7/3 1/2+1/3+1/42+1/3-1/4 2/3-(1/3+1/4) 2 4/5+(1/2-1/3) 3 1/8+(1/2-1/4) 1+1/2-1/3 8 +( 1/8 + 1/9) 2/9+1/2 3/2+2/1 8/72-4/36 6/30+9/45 3/9-9/271/4 + 3/4 6/2 -( 3/2 + 4/5 ) 8 + ( 1/8 + 1/9 ) 4/7 – 10/21 9/7 – 10/219/36-3/9 1/5-1/6 9/2+3/1 1/2-1/3 5/ 6 + 2/14 2/3 + 5/8 7/ 9 + 12/19 21/16 + 1/2 2/3+1/6/3/24 10-3/4 2/3+3/4 8/9 - 1/3 25/16 + 2/3 3.2+6.3-6.29.3+6.3-5.35.6-5.6+6.31.3+3.2-4.05.3-4.9+6.34.5+1.1-2.21. 12/3+1/2-3/2=3 2. 6/3-4/2+3/5=3/5 3. 5/5+1/5-2/5=4/5 4. 5/2-3/2+6/2=4 5. 8/3-2/3+1/3=7/3 6. 2/5+1-1/5=6/5 7. 8/3-1/3-2/3+7/3=4 8. 1/7-2/7+1/7=0 9. 1/4+2/4-2/3=1/12 10. 0+5/6-0=5/6 1+1/5+1/6-1/12-1/1=?1+1/5+1/6-1/12-1/2=?1+1/5+1/6-1/12-1/3=?1+1/5+1/6-1/12-1/4=?1+1/5+1/6-1/12-1/5=?1+1/5+1/6-1/12-1/6=?1+1/5+1/6-1/12-1/7=?1+1/5+1/6-1/12-1/8=?1+1/5+1/6-1/12-1/9=?1+1/5+1/6-1/12-1/10=?7/8 + ( 1/8 + 1/9 ) 78.1-1/4+8/9/7/9 79.+1/6/3/24+2/21 80./15*3/5 81.3/4/9/10-1/6 82./3+1/2)/5/6-1/3]/1/7 83./5+3/5/2+3/4 84.(2-2/3/1/2)]*2/5 85.+5268.32-2569 86.3+456-52*8 87.5%+6325 88./2+1/3+1/4 2) 89+456-78 1. 3/4-2/9 +1/4=?2. 5/6-4/9 +1/6-2/9=?3. 5/8+1/8-3/10-1/10=?4. 9/10-(1/10+2/5)=? 3/5-1/4+3/5=? (2)4/15+9/20-3/10=? (3)18/20-(1/4+2/5)=?(4)5/8+7/12-4/9=? (5)17/18-(1/12+1/6)=? (6)1/2+1/4-1/8=? 1+1/5+1/6-1/12-1/1=?1+1/5+1/6-1/12-1/2=?1+1/5+1/6-1/12-1/3=?1+1/5+1/6-1/12-1/4=?1+1/5+1/6-1/12-1/5=?1+1/5+1/6-1/12-1/6=?1+1/5+1/6-1/12-1/7=?1+1/5+1/6-1/12-1/8=?1+1/5+1/6-1/12-1/9=?1+1/5+1/6-1/12-1/10=?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 × 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 50+160÷40 (58+370)÷(64-45) 120-144÷18+35 347+45×2-4160÷52 34(58+37)÷(64-9×5) 95÷(64-45) 178-145÷5×6+42 420+580-64×21÷28 812-700÷(9+31×11) (136+64)×(65-345÷23) 85+14×(14+208÷26) (284+16)×(512-8208÷18) 120-36×4÷18+35 (58+37)÷(64-9×5) (6.8-6.8×0.55)÷8.5 0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6 6-1.6÷4= 5.38+7.85-5.37= 7.2÷0.8-1.2×5= 6-1.19×3-0.43= 6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9 10.15-10.75×0.4-5.7 5.8×(3.87-0.13)+4.2×3.74 32.52-(6+9.728÷3.2)×2.5 [(7.1-5.6)×0.9-1.15] ÷2.5 5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6 (4)12×6÷7.2-6