1. (1/81 + 8/9) * 8/9-70/81 +3/9-4/9
2. (91/10-70/5):7/9 + 3/10 - 6/9+2/10
3. (40/21 * 2/14) + (2/14 * 10/7) - 90/7 + 1/7
4. (4/100:2/200)* 64/100 + (70/100- 40/200)-156/100
5. (456/3000-120/1000)+70/1000)*2/1000:5/1000-64/4000
1. (1/81 + 8/9) * 8/9-70/81 +3/9-4/9
2. (91/10-70/5):7/9 + 3/10 - 6/9+2/10
3. (40/21 * 2/14) + (2/14 * 10/7) - 90/7 + 1/7
4. (4/100:2/200)* 64/100 + (70/100- 40/200)-156/100
5. (456/3000-120/1000)+70/1000)*2/1000:5/1000-64/4000