1+6+9+5+8+4+7+3+2=?
ai nhanh tay mk tick cho
Tính nhanh
a. 10 – 9 + 8 – 7 + 6 – 5 + 4 – 3 + 2 – 1
b. 1 + 3 + 5 + 7 + 9 + 10 + 8 + 6 + 4 + 2 + 0
ai tick cho mk mk tick lại cho
a. 10 – 9 + 8 – 7 + 6 – 5 + 4 – 3 + 2 – 1
= (10 – 9) + (8 – 7) + (6 – 5) + (4 – 3) + (2 – 1)
= 1 + 1 + 1 + 1 + 1
= 5
b. 1 + 3 + 5 + 7 + 9 + 10 + 8 + 6 + 4 + 2 + 0
= (0 +10) +(1 + 9) + (2 + 8) + (3 + 7) + (4 + 6) + 5
= 10 + 10 + 10 + 10 + 10 + 5
= 55
a) 10 - 9 + 8 - 7 + 6 - 5 + 4 - 3 + 2 - 1
= (10 - 9) + (8 - 7) + (6 - 5) + (4 - 3) + (2 - 1)
= 1 + 1 + 1 + 1 + 1
= 1 x 5
= 5
b) 1 + 3 + 5 + 7 + 9 + 10 + 8 + 6 + 4 + 2 + 0
= 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10
= (0 + 10) x 11 : 2
= 10 x 11 : 2
= 5 x 11
= 55
cho mk hoi
a, 1+2+3+4+5+7+....+202020
b, 1+2-3-4+5-6-7+8-...-2011-2012-2103+2014
ai nhanh tay mk tick cho
1+2+3+4+5+6+7+8+9=
ai nhanh tay mk tk cho
Số cần tìm la :
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 +9 = 45
Đáp số : 45
1+2+3+4+5+6+7+8+9
=(1+8)+(2+7)+(3+6)+(4+5)+9
=9+9+9+9+9
=9×5
=45
Vậy 1+2+3+4+5+6+7+8+9=45
1+1+1+1+1=...?
2+2+2+2+2=...?
3+3+3+3+3=...?
4+4+4+4+4=...?
5+5+5+5+5=...?
6+6+6+6+6=...?
7+7+7+7+7=...?
8+8+8+8+8=...?
9+9+9+9+9=...?
Ai nhanh mk tick cho
1+1+1+1+1=...?
2+2+2+2+2=...?
3+3+3+3+3=...?
4+4+4+4+4=4x5=20
5+5+5+5+5=5x5=25
6+6+6+6+6=6x5=30
7+7+7+7+7=7x5=35
8+8+8+8+8=8x5=40
9+9+9+9+9=9x5=45
1+1+1+1+1=5
2+2+2+2+2=10
3+3+3+3+3=15
4+4+4+4+4=20
5+5+5+5+5=25
6+6+6+6+6=30
7+7+7+7+7=35
8+8+8+8+8=40
9+9+9+9+9=45
1+1+2+3+4+5+6+7+8+9=?
ai nhanh mk tick cho
bằng 46
ai có acc kks cho mượn
bang bang nhé
hãy cho biết 1-2-3-4-5-6-7--8-9-9-111 =? ai nhanh mk se tick
1 - 2 - 3 - 4 - 5 - 6 - 7 - - 8 - 9 - 9 - 111
= 1 - 2 - 3 - 4 - 5 - 6 - 7 + 8 - 9 - 9 - 111
= -26 + 8 - 9 - 9 - 111
= -18 - (-18) - 111
= -36 - 111
= -147
1+2+3+4+5+6+7+8+9=?
ai nhanh nhất mk tick cho
kb với mk nha
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45
1 + 2 + 3 + 4 + 5 + 7 + 8 + 9
= ( 1 + 9 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 ) + 5
= 10 + 10 + 10 + 10 + 5
= 40 + 5
= 45
Minh nhanh nhat k minh nha
1,62/7:x=29/9:3/56
2, 1/5:x=1/5-1/7
3,2/3.x-4/7=1/8
4,2/7-8/9.x=2/3
5,4/7+5/9:x=1/5
6,2/5-2/5.x=2/5
7,2/3+1/3:x=-1
các bn ơi giúp mk vs mk đang cần gấp mong các bn giúp đỡ mk mai mk pải nộp ruì
ai nhanh tay lm mk tick cho
\(a,\frac{62}{7}:x=\frac{29}{9}:\frac{3}{56}\)
\(\frac{62}{7}:x=\frac{1624}{27}\)
\(x=\frac{62}{7}:\frac{1624}{27}=\frac{837}{5684}\)
\(b,\frac{1}{5}:x=\frac{1}{5}-\frac{1}{7}\)
\(\frac{1}{5}:x=\frac{2}{35}\)
\(x=\frac{1}{5}:\frac{2}{35}=\frac{7}{2}\)
\(c,\frac{2}{3}.x-\frac{4}{7}=\frac{1}{7}\)
\(\frac{2}{3}.x=\frac{1}{7}+\frac{4}{7}=\frac{5}{7}\)
\(x=\frac{5}{7}:\frac{2}{3}=\frac{15}{14}\)
\(d,\frac{2}{7}-\frac{8}{9}.x=\frac{2}{3}\)
\(\frac{8}{9}.x=\frac{2}{7}-\frac{2}{3}=-\frac{8}{21}\)
\(x=-\frac{8}{21}:\frac{8}{9}=-\frac{3}{7}\)
\(e,\frac{4}{7}+\frac{5}{9}:x=\frac{1}{5}\)
\(\frac{5}{9}:x=\frac{1}{5}-\frac{4}{7}=-\frac{13}{35}\)
\(x=\frac{5}{9}:-\frac{13}{35}=\frac{175}{117}\)
\(i,\frac{2}{5}-\frac{2}{5}.x=\frac{2}{5}\)
\(\frac{2}{5}.\left(1-x\right)=\frac{2}{5}\)
\(1-x=\frac{2}{5}:\frac{2}{5}=1\)
\(x=1-1=0\)
\(g,\frac{2}{3}+\frac{1}{3}:x=-1\)
\(\frac{1}{3}:x=-1-\frac{2}{3}=-\frac{5}{3}\)
\(x=\frac{1}{3}:-\frac{5}{3}=-\frac{1}{5}\)
học tốt nha
1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9=?
Ai nhanh nhất mình tick cho nha...............
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)x2
=45x2
=90
Chúc bạn học giỏi nha!!!