Bài tập môn Toán Lớp 6 - Ôn tập phép tính
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
BÀI TẬP ÔN CÁC PHÉP TINH Bài 1: Thực hiện phép tính: 3.52 + 15.22 – 26:2 53.2 – 100 : 4 + 23.5 62 : 9 + 50.2 – 33.3 32.5 + 23.10 – 81:3 513 : 510 – 25.22 20 : 22 + 59 : 58 100 : 52 + 7.32 84 : 4 + 39 : 37 + 50 29 – [16 + 3.(51 – 49)] 5.22 + 98:72 311 : 39 – 147 : 72 295 – (31 – 22.5)2 718 : 716 +22.33 (519 : 517 + 3) : 7 79 : 77 – 32 + 23.52 1200 : 2 + 62.21 + 18 59 : 57 + 70 : 14 – 20 32.5 – 22.7 + 83 59 : 57 + 12.3 + 70 151 – 291 : 288 + 12.3 238 : 236 + 51.32 - 72 791 : 789 + 5.52 – 124 4.15 + 28:7 – 620:618 (32 + 23.5) : 7 1125 : 1123 – 35 : (110 + 23) – 60 520 : (515.6 + 515.19) Bài 2: Thực hiện phép tính: 47 – [(45.24 – 52.12):14] 50 – [(20 – 23) : 2 + 34] 102 – [60 : (56 : 54 – 3.5)] 50 – [(50 – 23.5):2 + 3] 10 – [(82 – 48).5 + (23.10 + 8)] : 28 8697 – [37 : 35 + 2(13 – 3)] 2011 + 5[300 – (17 – 7)2] 695 – [200 + (11 – 1)2] 129 – 5[29 – (6 – 1)2] 2010 – 2000 : [486 – 2(72 – 6)] 2345 – 1000 : [19 – 2(21 – 18)2] 128 – [68 + 8(37 – 35)2] : 4 568 – {5[143 – (4 – 1)2] + 10} : 10 107 – {38 + [7.32 – 24 : 6+(9 – 7)3]}:15 307 – [(180 – 160) : 22 + 9] : 2 205 – [1200 – (42 – 2.3)3] : 40 177 :[2.(42 – 9) + 32(15 – 10)] [(25 – 22.3) + (32.4 + 16)]: 5 125(28 + 72) – 25(32.4 + 64) 500 – {5[409 – (23.3 – 21)2] + 103} : 15 III. TÌM X Bài 1: Tìm x: 165 : x = 3 x – 71 = 129 2x = 102 x + 19 = 301 93 – x = 27 22 + x = 52 Bài 2: Tìm x: 71 – (33 + x) = 26 (x + 73) – 26 = 76 45 – (x + 9) = 6 89 – (73 – x) = 20 (x + 7) – 25 = 13 198 – (x + 4) = 120 140 : (x – 8) = 7 4(x + 41) = 400 11(x – 9) = 77 5(x – 9) = 350 25 + 3(x – 8) = 106 32(x + 4) – 52 = 5.22 2(x- 51) = 2.23 + 20 450 : (x – 19) = 50 4(x – 3) = 72 – 110 2x – 49 = 5.32 200 – (2x + 6) = 43 135 – 5(x + 4) = 35 Bài 3: Tìm x: 7x – 5 = 16 156 – 2x = 82 10x + 65 = 125 8x + 2x = 25.22 15 + 5x = 40 5x + 2x = 62 - 50 5x + x = 150 : 2 + 3 0 : x = 0 3x = 9 4x = 64 2x = 16 9x- 1 = 9 x4 = 16 2x : 25 = 1 6x + x = 511 : 59 + 31 5x + 3x = 36 : 33.4 + 12 4x + 2x = 68 – 219 : 216 7x – x = 521 : 519 + 3.22 - 70 7x – 2x = 617: 615 + 44 : 11 5x + x = 39 – 311:39 IV. TÍNH NHANH 58.75 + 58.50 – 58.25 27.39 + 27.63 – 2.27 128.46 + 128.32 + 128.22 66.25 + 5.66 + 66.14 + 33.66 12.35 + 35.182 – 35.94 35.23 + 35.41 + 64.65 29.87 – 29.23 + 64.71 48.19 + 48.115 + 134.52 27.121 – 87.27 + 73.34 125.98 – 125.46 – 52.25 136.23 + 136.17 – 40.36 17.93 + 116.83 + 17.23 19.27 + 47.81 + 19.20 87.23 + 13.93 + 70.87 V. TÍNH TỔNG Bài 1: Tính tổng: S1 = 1 + 2 + 3 + + 999 S2 = 10 + 12 + 14 + + 2010 S3 = 21 + 23 + 25 + + 1001 S4 = 24 + 25 + 26 + + 125 + 126 S5 = 1 + 4 + 7 + +79 S6 = 15 + 17 + 19 + 21 + + 151 + 153 + 155 S7 = 15 + 25 + 35 + +115 VI. BÀI TẬP BỔ SUNG Bài 1: Thực hiện phép tính: 1) 2) 3) 4) 5) 6) 47.69 + 47.31 7) 8) 9) 10) 11) [545 - (45 + 4.25)] : 50 - 2000 : 250 + 215 : 213 12) [504 - (25.8 + 70)] : 9 - 15 + 190 13) 5 . {26 - [3.(5 + 2.5) + 15] : 15} 14) [1104 - (25.8 + 40)] : 9 + 316 : 312 Bài 2: Tìm x N biết: 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 1440 : [41 - (2x - 5)] = 24 . 3 12) 5.[225 - (x - 10)] -125 = 0 13) (x - 15) : 5 + 22 = 24 14b) 42 - (2x + 32) + 12 : 2 = 6 15) 134 - 2{156 - 6.[54 - 2.(9 + 6)]}. x = 86
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