Bài tập Số học 6 - Dạng toán tìm x

Nội dung text: Bài tập Số học 6 - Dạng toán tìm x

1. Bài 1: Tìm x a) 89.(x2+62) – 1250 = 4179 n) {84 + [32 + (x - 24)]}.3 = 444 b) 98. 2x+2 - 5685 = 587 o) {384 – [12 + (44 - x)]}.8 = 2768 c) 38880 : 6x = 5 p) {684 + [65 – (54 – x)]}.15 = 10785 d) 65.(2x +35) = 10595 q) 34560 : 2x+8 = 32 e) 800. 2x = 25600 r) 8960 : 2x+3 = 35 f) 89 + 3.(x+32) = 260 s) 48843 : 3x+1 = 67 g) 3200 – 18.(5x +92) = 1292 t) 5x+2.66 + 32 = 41282 h) 41 + 32.(x – 3) = 292 u) 6x+3 .2 – 76.198 = 504 i) (998.10000x + 432) :3=949 v) 98-x .2 – 535.128 = 49618 j) 37.25 – 6.(x-32) = 607 w) 49-x .28 = 458752 k) 296 – 4.(x+7) = 22.32 x) 215-x .3 – 2888 = 9400 l) 500.4x = 512000 y) 35-x .62 – 65.21 = 309 m) 95.( x5 + 125) – 23.5.163 = 8395 z) 123120 : 69-x = 95 Bài 2: Thực hiện phép tính a) 35.25:125 +36.4 w) (61.37 – 61.25 ) : 6 b) (65.35 – 35.30).2 x) [99.(100+1) + 98.(100+1)] : 197 c) 53 – (127+8) : 32 + 42018-2016 y) (45.32 – 36.13 +288) : (32.5) d) [65 + 2.(52 – 12) – 2502019-2019] : 3 z) (122 .362.452) : (432.45) e) [165 + 3.(36-15)].8 f) (52.36 +4250 – 300) : 25 g) {250 + [95.(12+36)-322]}:6 h) {850 + [295.(18+54)-342]} : (36 : 34) i) (32.25.12 - 25.3.64) : 8 j) 15360 : [24 .52 + (42 .5)] k) (360 +2.360 – 23.3) : 132 l) (25+36.45) : 5 m) (32 – 25)2 .38 +24.25 n) [(85 – 92)2 .36] : (48-36)2 o) (54.32 – 25.32 + 65) : 4 p) (85.35 – 25.85) : 52 q) (46.25 + 65.25) : 15 r) [18.39 + (54-23) +367] : 11 s) (25.36 – 21.36)2 : 24 t) (98.72 + 98.28 -3250) : 52 u) [24.(150 – 125)] : 15 v) [85.(42+38)] : 25