Bài 1. Tính nhanh
| a) 58.75 + 58.50 – 58.25
b) 27.39 + 27.63 – 2.27 c) 128.46 + 128.32 + 128.22 d) 66.25 + 5.66 + 66.14 + 33.66 e) 12.35 + 35.182 – 35.94 f) 35.23 + 35.41 + 64.65 g) 29.87 – 29.23 + 64.71 |
h) 48.19 + 48.115 + 134.52
i) 27.121 – 87.27 + 73.34 j) 125.98 – 125.46 – 52.25 k) 136.23 + 136.17 – 40.36 l) 17.93 + 116.83 + 17.23 m) 19.27 + 47.81 + 19.20 n) 87.23 + 13.93 + 70.87 |
Bài 2. Tính.
- 75 + 58.50 – 58.25 h. 47 – (45.24– 52.12) : 14
- 20 : 22– 59: 58 i. 102 – 60 : (56 : 54 – 3.5)
- (519: 517– 4) : 7 k. 2345 – 1000 : [19 – 2(21 – 18)2]
- – 84 : 4 + 39: 37 l. 1205 – [1200 – (42 – 2.3)3 : 40
- 295 – (31 – 22.5)2 m. 500 – {5[409 – (23.3 – 21)2] + 103} : 15
- 1125: 1123– 35 : (110 + 23) – 60. n. 967 – [8 + 2.32 – 24 : 6 + (9 – 7)3].5
- 29 – [16 + 3.(51 – 49)]