\(5\times2+5\times3+5\times5\)
\(=10+15+25\)
\(=50\)
5 x 2 + 5 x 3 + 5 x 5
= 5 x ( 2 + 3 + 5 )
= 5 x 10
= 50
5 x 2 + 5 x 3 + 5 x 5
= 5 x (2 + 3 + 5)
= 5 x 10
= 50
\(5\times2+5\times3+5\times5\)
\(=10+15+25\)
\(=50\)
5 x 2 + 5 x 3 + 5 x 5
= 5 x ( 2 + 3 + 5 )
= 5 x 10
= 50
5 x 2 + 5 x 3 + 5 x 5
= 5 x (2 + 3 + 5)
= 5 x 10
= 50
tính nhanh
a ) 4 x 2 x 4 x 3 + 4 x 4 + 4
b ) 5 x 23 - 5 x 2 - 5 x 3 - 5 x 4 - 5 x 5 + 5
1 x 2 = ?
1 x 2 x 3 = ?
1 x 2 x 3 x 4 = ?
1 x 2 x 3 x 4 x 5 = ?
1 x 2 x 3 x 4 x 5 x 6 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 = ?
Tìm x :
a) x − 4 = 2
x : 4 = 2
b) x − 5 = 4
x : 5 = 4
c) x − 3 = 3
x : 3 = 3
2 + 2 + 2 + 2 +2 = ?
1 x 3 + 3 x 5 + 5 x 7 + 7 x 9 + 9 x 11 = ?
5 x 8 + 5 = ?
4 x 3 + 6 = ?
3 x 8 + 5 = ?
2 x 3 + 6 = ?
1 tick
Tính nhẩm:
3 x 4 = ............... 3 x 5 = ...............
4 x 7 = ............... 5 x 4 = ...............
15 : 3 = .............. 24 : 4 = ..............
5 x 6 = ............... 5 x 9 = ...............
25 : 5 = ..............
Bài 1 : Tính
8 x 8 =
6 x 4 =
4 x 4
Bài 2 : < , > , =
4 x 6 7 x 5
5 x 7 8 x 9
3 x 5 6 x 9
Tìm x :
a) x : 3 = 5
b) x : 4 = 2
c) x : 5 = 4
Tìm x,biết :
2 + 5 + 3 = x - 3
5 + 25 = x X 6