1 x 2 x 3 x 4 x 5 x 6 - 6 x 5 x 4 x 3 x 2 x 1 + 9999
= 720 - 720 + 9999
= 0 + 9999
= 9999
1 x 2 x 3 x 4 x 5 x 6 - 6 x 5 x 4 x 3 x 2 x 1 + 9999
= 720 - 720 + 9999
= 0 + 9999
= 9999
A= 5/9*7/13+5/9*6/13
B=(1/99+12/999+123/9999)*(1/2-1/3-1/6)
tính
1+1+1+1+2+2+2+2+3+3+3+3+4+4+4+4+5+5+5+5+6+6+6+6+7+7+7+7+8+8+8+8+9+9+9+9=?
Hãy cho mình đáp án nhé ! yêu các bạn nhiều .
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+1+2+3+4+5+6+7+8+9=????????????
Lấy điểm hỏi đáp nè
ai đúng mình tick 3 tick nha
1+2+3+4+5+...........+9997=9998+9999=?
1*2*3+1*3*4+1*4*5+1*5*6+1*6*7
1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9+0+0+0+3+4+1+2+3+111+44+99
1*2*3*4*5*6*7*3*5*7*3*5*3*0*5*6*4*6*3*12*4*76*7*899*45=?
Tính nhẩm
a) 6 x 2 = ..... 6 x 3 = ..... 6 x 8 = ..... 6 x 1 = .....
6 x 4 = ..... 6 x 5 = ..... 6 x 9 = ..... 1 x 6 = .....
6 x 6 = ..... 6 x 7 = ..... 6 x 10 = ..... 0 x 6 = .....
b) 6 x 5 = ..... 6 x 4 = ..... 3 x 6 = ..... 2 x 6 = .....
5 x 6 = ..... 4 x 6 = ..... 6 x 3 = ..... 6 x 2 = .....
1+1-2+2-3+3-4+4-5+5-6+6-7+7-8+8-9+9-10=?