能简算的要简算 (1) 7.54.96.5 (2) 6.272.93.1 (3) 6.293.82.716.2 (4) 8.54(3.42.54) (5) 4.023.50.98 (6) 13.642.82.64 (7) 3.76+1.99 (8) 6.650.820.182.35 (9) 8.70.38.70.3 (10)56.39-(7.21+2.79+1.39) (11) (6.125-2.75)-(1.25-0.875) (12) 7.8-(5.7-2.2)-4.3 (13) 75-18.3-7.08-9.62 (14)0.7777 0.70.1111 5.1 (15) 3.84 1878.7 38.4 (16)7.32.40.68 (17)9.071.072.5 (18)12.53.22.5 (19)0.76101 (20) 0.83.91.25 (21) 5.2973+52.92.7 (22)0.253.20.125 (23) 4.7+0.1-4.7+0.1 (24) 0.9 56.2+56.210 (25) 3.597+0.335 (26) 1.7550.2 (27)13.45-8.86+12.45 (28) 9.2-4.73+2.27 (29) 0.9+0.99+0.999+0.9999