Bài 1: Thực hiện phép tính:
a) 3.52 + 15.22 – 26:2 b) 53.2 – 100 : 4 + 23.5 c) 62 : 9 + 50.2 – 33.3 d) 32.5 + 23.10 – 81:3 e) 513 : 510 – 25.22 f) 20 : 22 + 59 : 58 g) 100 : 52 + 7.32 h) 84 : 4 + 39 : 37 + 50 i) 29 – [16 + 3.(51 – 49)] | j) (519 : 517 + 3) : 7 k) 79 : 77 – 32 + 23.52 l) 1200 : 2 + 62.21 + 18 m) 59 : 57 + 70 : 14 – 20 n) 32.5 – 22.7 + 83 o) 59 : 57 + 12.3 + 70 p) 5.22 + 98:72 q) 311 : 39 – 147 : 72 r) 295 – (31 – 22.5)2 | s) 151 – 291 : 288 + 12.3 t) 238 : 236 + 51.32 - 72 u) 791 : 789 + 5.52 – 124 v) 4.15 + 28:7 – 620:618 w) (32 + 23.5) : 7 x) 1125 : 1123 – 35 : (110 + 23) – 60 y) 520 : (515.6 + 515.19) z) 718 : 716 +22.33 aa) | ||
Bài 2: Thực hiện phép tính: a) 47 – [(45.24 – 52.12):14] b) 50 – [(20 – 23) : 2 + 34] c) 102 – [60 : (56 : 54 – 3.5)] d) 50 – [(50 – 23.5):2 + 3] e) 10 – [(82 – 48).5 + (23.10 + 8)] : 28 f) 8697 – [37 : 35 + 2(13 – 3)] g) 2011 + 5[300 – (17 – 7)2] h) 695 – [200 + (11 – 1)2] i) 129 – 5[29 – (6 – 1)2] j) 2010 – 2000 : [486 – 2(72 – 6)] | k) 2345 – 1000 : [19 – 2(21 – 18)2] l) 128 – [68 + 8(37 – 35)2] : 4 m) 568 – {5[143 – (4 – 1)2] + 10} : 10 n) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3]}:15 o) 307 – [(180 – 160) : 22 + 9] : 2 p) 205 – [1200 – (42 – 2.3)3] : 40 q) 177 :[2.(42 – 9) + 32(15 – 10)] r) [(25 – 22.3) + (32.4 + 16)]: 5 s) 125(28 + 72) – 25(32.4 + 64) t) 500 – {5[409 – (23.3 – 21)2] + 103} : 15 u) |
| ||
II. TÌM X
Bài 1: Tìm x:
a) 71 – (33 + x) = 26 b) (x + 73) – 26 = 76 c) 45 – (x + 9) = 6 d) 89 – (73 – x) = 20 e) (x + 7) – 25 = 13 f) 198 – (x + 4) = 120 g) 140 : (x – 8) = 7 h) 4(x + 41) = 400 i) 11(x – 9) = 77 | j) 5(x – 9) = 350 k) 2x – 49 = 5.32 l) 200 – (2x + 6) = 43 m) 2(x- 51) = 2.23 + 20 n) 450 : (x – 19) = 50 o) 4(x – 3) = 72 – 110 p) 135 – 5(x + 4) = 35 q) 25 + 3(x – 8) = 106 r) 32(x + 4) – 52 = 5.22 |
Bài 2. Tìm x
a) 156 – (x+ 61) = 82 b) (x-35) -120 = 0 c) 124 + (118 – x) = 217 d) 7x – 8 = 713 e) x- 36:18 = 12 f) (x- 36):18 = 12 g) (x-47) -115 = 0 h) 315 + (146 – x) = 401 i) (6x – 39 ) : 3 = 201 j) 23 + 3x = 56 : 53 k) 5x + x = 39 – 311:39 | l) 7x – x = 521 : 519 + 3.22 - 70 m) 7x – 2x = 617: 615 + 44 : 11 n) 0 : x = 0 o) 3x = 9 p) 4x = 64 q) 2x = 16 r) 9x- 1 = 9 s) x4 = 16 t) 2x : 25 = 1 |
Bài 3: Tìm x:
a) x - 7 = -5 b) 128 - 3 . ( x+4) = 23 c) [ (6x - 39) : 7 ] . 4 = 12 d)( x: 3 - 4) . 5 = 15 | a) | x + 2| = 0 b) | x - 5| = |-7| c) | x - 3 | = 7 - ( -2) d) ( 7 - x) - ( 25 + 7 ) = - 25 | e)( 3x - 24 ) . 73 = 2 . 74 g) x - [ 42 + (-28)] = -8 e) | x - 3| = |5| + | -7| g) 4 - ( 7 - x) = x - ( 13 -4) |
III. TÍNH NHANH
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) 48.19 + 48.115 + 134.52 g) 27.121 – 87.27 + 73.34 h) 125.98 – 125.46 – 52.25 | i) 136.23 + 136.17 – 40.36 j) 17.93 + 116.83 + 17.233 k) 5.23 + 35.41 + 64.65 l) 29.87 – 29.23 + 64.71 m) 19.27 + 47.81 + 19.20 n) 87.23 + 13.93 + 70.87 |