(1)原式=7.04+12.96+8.73 =20+8.73 =28.73 |
(2)原式=8.94+1.06+(6.8+13.2) =10+20 =30 |
(3)原式= 4.308-3.308+4.298 =1+4.298 =5.298 |
(4)原式=17-(5.47+4.53) =17-10 =7 |
(5)原式=9.93-5.93+7.29 = 4+7.29 =11.29 |
(6)原式=8.47+(4.397-4.397) =8.47+0 =8.47 |
(7)原式=6.87+3.13+(2.8+7.2) =10+10 =20 |
(8)原式=7-(0.715+0.285) =7-1 =6 |