1*2*3*...*9-1*2*3*...*8-1*2*3*...8*8=9!-8!-8!*8
=8!*9-8!*1-8!*8
=8!*(9-1)-8!*8
=8!*8-8!*8
=0
1*2*3*...*9-1*2*3*...*8-1*2*3*...8*8=9!-8!-8!*8
=8!*9-8!*1-8!*8
=8!*(9-1)-8!*8
=8!*8-8!*8
=0
1-2-3-4-5-6-7-8-9-0+4+9+1+2+3+4+5:3:5:6:67:8:96+7+8+9+9-2-3-4-5-6-7-8-9-2+4+2+1+3+4+5+6+7+9+0+8+67?
LÂY BÚA CHAC ĐẦU ĐUÔI HỎI =?
(1+2+3+4-1-2-3-4)*1*2*3*4*5*6*7*8*9*1*2*3*4*5*6*7*8*9....................*1*2*3*4*5*6*7*8*9
đố đó
1) 1 3/4-1 3/8:(3/8+9/20)
2) 4 7/8-3 11/12:( 5/6+1 1/8)
3) 8 2/3 : ( 6 2/3-4 1/2)-2 37/51
a) 4 3/8 + 5 2/3 b) 2 3/8 + 1 1/4 + 3 6/7
c) 2 3/8 - 1 1/4 + 5 1/3 d) (5/2 + 1/3) : ( 1 - 1/2)
e) (5/2 - 1/3) x 9/2 - 6/7
Bài 1: Tìm x:a) x - 2 + 7 = 1 . 3 . -9 b) 4 . x - 1 = (-5) 5 12 2 4 16 9 2 9c) -2 . x + 5 = 7 d) 2 . x : 7 . 1 = 29 3 8 12 5 3 8 15Bài 2: Tính:a) 2 + 1 . 4 b) 0,8 : [ 4 . 1,25] - [ 0,64 - 1 ] 5 7 5 25--------------------- 8 - 1 : 3 2 5 c) 8 : [ 7 - 12 ] d) ( 1,08 - 2 ) : 4 + ( 59 - 13 ). 36 9 2 7 25 7 9 4 17----------------------- [ 5 - 1 ] : 4
b1: th phép tính a. 10/11 : 19/22 + 9/11 : 19/22 b. 20/9 . 84 - 2/9 . 84 c. (1/2 - 1/3) . (5 - 1/4) d. (1/2 - 1/3 - 1/6) . (3/202 + 4/203 + 5/204) b2: th phép tính a. 4 3/8 + 5 2/3 ( hỗn số) b. 2 3/8 + 1 1/4 + 3 6/7 (hỗn số) c. 2 3/8 - 1 1/4 + 5 1/3 (hỗn số) d. 3 5/6 + 2 1/6 . 6 (hỗn số) e. 3 1/2 + 4 5/7 - 5 5/14 (hỗn số) f. 4 1/2 + 1/2 : 5 1/2 (hỗn số) giúp với ạ
Tính 1) 4/5 +13/18 2) 3/7 -11/8 3) -7/10 - -4/5 4) 3/20 -1/25 5) 2/3 - 5/6 6) 1/4 + -3/8 - 19/10 7) -9/10 - -7/18 8) 3/10 - 11/18 9) 3/5 -5/6 + -7/12 10) -4/9 - (-5 )/6 - 3/8
Đưa thừa số chung ra ngoài 4 1/3 . 4/9 + 13 2/3 . 4/9 B, 5 1/4 . 3/8 + 10 3/4 . 3/8 C, 6 1/5.(-2/7)+ 14 4/5 . (-2/7)
\(A=1*2*3*4*5*6*7*8*9-1*2*3*4*5*6*7*8-1*2*3*4*5*6*7*8*8\)