\(2^5.2^x:2^3=64=2^6\)
\(2^5.2^x=2^6.2^3=2^9\)
\(2^x=2^9:2^5=2^4\)
=>x=4
25x2x:23=64
25x2x:23=26
5x:3=6
5x=18
x= 3,6
bỏ ngoạc
a)-(23+17-64)-(-24)
b)(12+64-13)-(23-26-27)
Bài 4: Tính nhanh
1/ 5 . 25 . 2 . 16 . 4 2/ 25 . 5 . 4 . 27 . 2 3/ 23 . 17 - 23 . 17 4/ 58 .75 + 58 . 50 – 58 . 25 | 5/ 125 . 98 – 125 . 46 – 52 . 25 6/ 136 . 23 + 136 . 17 – 40 . 36 7/ 5 . 23 + 35 . 41 + 64 . 65 8/ 29 . 87 – 29 . 23 + 64 . 71 |
87x15-23 / 87x14+64
87x15-23 / 87x14-64
Tính ;
64 x 23 + 37 x 23 - 23
29 . 87 - 29 . 23 + 64 . 71
Tính nhanh :
35 . 23 .+ 35 . 41 + 64 . 65 =
29 . 87 - 29 . 23 + 64 . 71 =
27 . 121 - 87 . 27 + 73 . 34 =
Ai nhanh mk tick cho mà nhớ nhắn tin cho mk để mk bt mà tick
29 x 23 - 29 x 87 - 71 x 64
a)64:23=.........
b)75:343=.............
c)243:33:3=...........
