1、200= 1.5-0.06= 0.7515= 0.40.8= 40.25= 0.36+1.54= 1.0199= 42035= 2512= 1350.5= 3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2= 1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 = 二、带答案100道: (1)12 0.5 = 答案:6(2)5.9 0.2 = 答案:1.18 (3)3.6 7 = 答案:25.2 (4)4.3 0.3 = 答案:1.29 (5)5.9 9 = 答案:53.1 (6)9.4 84.6 (7)7.5 6 = 答案:45
2、 (8)1.3 3 = 答案:3.9 (9)3.8 26.6 (10)4.7 5 = 答案:23.5 (11)5.2 36.4 (12)2.3 2 = 答案:4.6 (13)6.8 47.6 (14)6.7 2.01 (15)7.5 52.5 (16)7.1 0.7 = 答案:4.97 (17)6.6 13.2 (18)3.5 0.7 (19)3.7 1.11 (20)4 1.2 (21)9.2 82.8 (22)6.1 54.9 (23)6.8 34 (24)4.8 4 = 答案:19.2 (25)4.1 8.2 (26)6.4 0.4 = 答案:2.56 (27)9.6 67.2 (28)
3、1.9 0.8 = 答案:1.52 (29)4.2 1.26 (30)1.9 (31)8.7 3.48 (32)2.6 18.2 (33)2.1 6.3 (34)1.6 3.2 (35)5.3 15.9 (36)8.5 76.5 (37)6.9 4.83 (38)6.6 2.64 (39)4.3 8 = 答案:34.4 (40)8.2 24.6 (41)8.4 50.4 (42)2 12 (43)8.7 2.61 (44)3.2 1.6 (45)8.5 0.9 = 答案:7.65 (46)7.1 (47)7.1 42.6 (48)7.4 3.7 (49)9.6 28.8 (50)8.4 (51)2.5 10 (52)1.3 (53)8 (54)7.8 70.2 (55)6 3 (56)7.7 61.6 (57)9.9 6.93 (58)5.4 10.8 (59)5.1 10.2 (60)4.7 14.1 (61)1.2 0.24 (62)5.3 1.06 (63)2.7 21.6 (64)2 18 (65)9.6 86.4 (66)5.4 16.2 (67)9.3 27.9 (68)5.5 4.4 (69)7.4 5.18 (70)3.4 0.6 = 答案:2.04 (71)4.5 1.8 (72)3.8 (73)4.7 0.2