\(\frac{\left(17\frac{2}{9}-15\frac{2}{15}\right):5\frac{2}{9}}{\left(18+3,75\right):0,75}\)
tính nhanh :
52 x 18 + 9 x 36 + 18 x 36
ko làm tắt nha
18 . 34 + (-18) . 124 - 36 . 17 + 9. (-52) cách lam
Tính hợp lí: | a) 5. 11. 18 + 9. 31. 10 + 4. 29. 45;b) 37. 39 + 78. 14 + 13. 85 + 52. 55. |
\(\frac{18\cdot34+\left(-18\right)\cdot124}{-36\cdot17+9\cdot\left(-52\right)}\)
1. x - 8 +32= 68
2. x +8+32=68
3. 98-x +34=43
4. 98+x-34=43
5. x :5:4=800
6. 18+x=384:8
7. (84,6-2 x x):3,02= 5,1
8. x x5= 120:6
9. (15x 24-x) :0,25= 100:0,25
x+0,25=18 phần 5 + 43 phần 4
1) 73 – (2 – 9) 2) (–45) + 27 – 8 3) 27 – 52 + (–18)
4) (–4) . (–12) 5) (–36) : 9 6) (–14) : (–7)
7) 24 : (–8) . (–15) 8) (–54) – (–6) . 5 + 9 9) (–2) . 25 + 54 : (–3)3
10) (35 – 28) . (–17 + 12)2 11) –400 : (–3 – 7)2 + 9 12) (–5)2 . (–2) + 48 : (–4)2 13) (–10) + 54 : [(–3)2 . (–4) + (14 – 17)2] 14) (–60) : [11 + (6 – 9)2] 15) –70 : {46 – [12 + 5 . (–32 : 16)2]} – 20210
A) -7/9 + 5/12 - 13/18
B) 0,25 . 30 . 2 . 1/3 . 8/45 . 0,5
C) (4 - 5/12) : 4 +5/24
Chỉ mình cách làm với đừng ghi luôn đáp án được không?