Ta có: 1-2-3+4+5-6-7+8+...+801-802-803+804
=(1-2-3+4)+(5-6-7+8)+...(801-802-803+804)
=0+0+...+0
=0
Ta có: 1-2-3+4+5-6-7+8+...+801-802-803+804
=(1-2-3+4)+(5-6-7+8)+...(801-802-803+804)
=0+0+...+0
=0
1 - 2 - 3 + 4 + 5 - 6 - 7 + 8 + .... + 801 - 802 - 803 + 804
tính
1-2-3+4+5-6-7+8+...+801-802-803+804
Tính
1/ (-6 – 2). (-6 + 2)
2/ (7. 3 – 3) : (-6)
3/ (-5 + 9) . (-4)
4/ 72 : (-6. 2 + 4)
5/ -3. 7 – 4. (-5) + 1
6/ 18 – 10 : (+2) – 7
7/ 15 : (-5).(-3) – 8
8/ (6. 8 – 10 : 5) + 3. (-7)
Tính
1/ (-6 – 2). (-6 + 2)
2/ (7. 3 – 3) : (-6)
3/ (-5 + 9) . (-4)
4/ 72 : (-6. 2 + 4)
5/ -3. 7 – 4. (-5) + 1
6/ 18 – 10 : (+2) – 7
7/ 15 : (-5).(-3) – 8
8/ (6. 8 – 10 : 5) + 3. (-7)
1/ x + 1/2 = -5/3 6/ x - 1/5 = 9/10
2/ 1/3 - x = 3/5 7/ x + 5/12 = 3/8
3/ 3-4 + x = 7/2 8/ x + 5/4 = 7/6
4/ x - 4/3 = -7/9 9/ x - 2/7 = 1/35
5/ x - -7/3 = 5/6 10/ x - 1/5 = -7/10
1/ x + 1/2 = -5/3
2/ 1/3 - x = 3/5
3/ 3-4 + x = 7/2
4/ x - 4/3 = -7/9
5/ x - -7/3 = 5/6
6/ x - 1/5 = 9/10
7/ x + 5/12 = 3/8
8/ x + 5/4 = 7/6
9/ x - 2/7 = 1/35
10/ x - 1/5 = -7/10
Tính nhanh
1/2-2/3+3/4-4/5+5/6-6/7+7/8+6/7-5/6+4/5-3/4+2/3-1/2
ai giúp mình với mk tick cho!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
(1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 0)*( 9 - 8 + 7 - 6 + 5 - 4 - 3 + 2 - 1)*( 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 ×9)*(1-1+2-2+3+4-7)=?
Tính nhanh
Các bạn viết luôn kết quả cho mình nha😂😂😂😂😂😂😂😂
\(\frac{10+\frac{9}{2}+\frac{8}{3}+\frac{7}{4}+ \frac{6}{5}+\frac{5}{6}+\frac{4}{7}+\frac{3}{8}+\frac{2}{9}+\frac{1}{10}}{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{10}+\frac{1}{11}}\)