Các câu hỏi tương tự
Bài 2: Tính hợp lí
1) 125.(-24) + 24.225
2) 512.(2 – 128) – 128. (-512)
3) (187 -23) – (20 – 180)
4) (-37 – 17). (-9) + 35. (-9 – 11)
5) (-50 +19 +143) – (-79 + 25 + 48)
6) (-8).25.(-2). 4. (-5).125
7) 3784 + 23 – 3785 – 15
8) 215 +(-38) – (-58) –15
9) 5.(-3)2 –14.(-8)+(-40)
10) 215 + (-38) – (- 58) + 90 – 852)
Bài 3*: Tìm các cặp số nguyên (x;y) thỏa mãn xy2 + 2x – y2 =
(-50+19+143)-(-79+25+48)
(-25)(75-45)-75(45-25)
(-37-17).(-9)+35.(-9-11)
(187-23)-(20-180)
512.(2-128)-128.(-512)
17.(-25)+25.21
Giải rõ ra nha ! Mình cần gấp !
tính hợp lý
a)5.(-3)^2-14.(-8)+(-40)
b)31-[26-(209+35)]
c)237+26-(209+26)
d)21+22+23+24-11-12-13-14
e)(-12).46-12.54
g)(-8).25.(-2).4.(-5).125
h)(-50+19+143)-(-79+25+48)
i)(-37-17).(-9)+35.(-9-11)
k)512.(2-128)-128.(-512)
l)160:{|-17|+[3^2.5-(14+2^11:2^8)]
m)|-6|+(-17)+|-4|+(-3)
n)5^6:5^3-5^0.5^1.5^2
o)100:{31-[24:(18-7.2)]}
k)
tinh nhanh
3) (187 -23) – (20 – 180)
4) (-37 – 17). (-9) + 35. (-9 – 11)
5) (-50 +19 +143) – (-79 + 25 + 48)
6) (-8).25.(-2). 4. (-5).125
7) 3784 + 23 – 3785 – 15
tinh nhanh
3) (187 -23) – (20 – 180)
4) (-37 – 17). (-9) + 35. (-9 – 11)
5) (-50 +19 +143) – (-79 + 25 + 48)
6) (-8).25.(-2). 4. (-5).125
7) 3784 + 23 – 3785 – 15
Dạng 2 : Tính hợp lí1. 3.(-4)2 + 2.(-5) – 202. (- 54 ) + (+ 39) - ( +10) + ( - 85)3. 5.(-3)2 –14.(-8)+(-40)4. (- 24 ) + (- 30 ) - ( - 40)5. 31 – [26 – (209 + 35)]6. 29-(-25) + ( + 40)7. 231+26-(209+26)8. 215 + (-38) – (- 58) + 90 – 859. 21 + 22 + 23 + 24 – 11 – 12 – 13 – 1410. 215 +(-38) – (-58) –15 11. (-12).46 – 12.5412. 3784 + 23 – 3785 – 15 13. (-8).25.(-2). 4. (-5).125 14. 19.25 + 9.95 + 19.3015. (-50 +19 +143)...
Đọc tiếp
Dạng 2 : Tính hợp lí
1. 3.(-4)2 + 2.(-5) – 20 | 2. (- 54 ) + (+ 39) - ( +10) + ( - 85) |
3. 5.(-3)2 –14.(-8)+(-40) | 4. (- 24 ) + (- 30 ) - ( - 40) |
5. 31 – [26 – (209 + 35)] | 6. 29-(-25) + ( + 40) |
7. 231+26-(209+26) | 8. 215 + (-38) – (- 58) + 90 – 85 |
9. 21 + 22 + 23 + 24 – 11 – 12 – 13 – 14 | 10. 215 +(-38) – (-58) –15 |
11. (-12).46 – 12.54 | 12. 3784 + 23 – 3785 – 15 |
13. (-8).25.(-2). 4. (-5).125 | 14. 19.25 + 9.95 + 19.30 |
15. (-50 +19 +143) – (-79 + 25 + 48) | 16. (-25)(75 – 45) – 75(45 – 25) |
17. (-37 – 17). (-9) + 35. (-9 – 11) | 18. (187 -23) – (20 – 180) |
19. 512.(2 – 128) – 128.( - 512) | 20. 17.(-25) + 25.21 |
21. 160 : {|-17| + [32.5 – (14 + 211: 28)]} | 22. 16.(38 – 2) – 38(16 – 1) |
23. | -6 | + (-7) +| -4 | +(-3) | 24. 26.(- 125) – 125.( - 36) |
25. 56 : 53 – 50 . 51 . 52 | 26. 125.( -24) + 24.225 |
27. 21.135 + 21.65 – 200 | 28. 42+ (–19)+ 58 – (–19) |
29. 100 : {31 – [24 : (18 – 7.2)]} | 30. 23 . 5 – 32 . 4 + 4.6 |
Chỉ cần làm những câu chẵn thui nhaa!
(-25).8.(-4).(-125).3
27.(-17)+17.(-73)
512(2-128)-128(-512)
Tính hợp lí:
a) 125. ( -24 ) + 24 . 225
b) 24. ( -125 ) - 125. ( -36 )
c) 512. ( 2- 128 ) - 128. ( -512 )
d) ( -8 ). 25 .( -2 ). 4 .( -5 ). 125
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 – 2 2 .3) + (32 .4 + 16)]: 5
s) 125(28 + 72) – 25(32 .4 + 64)
giúp mk