8 x 1 =
8 x 2 =
8 x 3 =
8 x 4 =
8 x 5 =
8 x 6 =
8 x 7 =
8 x 8 =
8 x 9 =
8 x 10 =
giúp mik nha
1/ 10(X-7)-8(X+5)=6(-5)+24
2/ 8(X-|-7|)-6(X-2)=|-8|.6-50
3/ 2(4X-8)-7(3+X)=|-4|(3-2)
4/ 12(X-4)=6(x-2)-16(X+3)=7|-4|
5/ 4(X-5)-7(5-X)+10(5-X)=-3
bn nào giải giúp mik vs nha:)))
1/ 10(X-7)-8(X+5)=6(-5)+24
10x - 70 - 8x - 40 = -30 +24
2x - 110 = -6
2x = 104
x=52
2/ 8(X-|-7|)-6(X-2)=|-8|.6-50
8(x - 7) - 6(x-2) = 8.6 - 50
8x - 56 - 6x +12 =48 -50
2x - 44 = -2
2x = 42
x=21
3/ 2(4X-8)-7(3+X)=|-4|(3-2)
8x-16 - 21 - 7x = 4.1
x-37=4
x=41
4/ 12(X-4)=6(x-2)-16(X+3)=7|-4|
12x - 48 = 6x - 12 - 16x -48 =7.4
12x - 48 = 28
12x=76
x=19/3
5/ 4(X-5)-7(5-X)+10(5-X)=-3
4x - 20 -35 +7x + 50 -10x = -3
x - 5 = -3
x = -2
Chúc bạn học tốt!
Tính
8 x 1 = ..... 8 x 3 = ..... 8 x 5 = ..... 8 x 7 = ..... 8 x 9 = .....
8 x 2 = ..... 8 x 4 = ..... 8 x 6 = ..... 8 x 8 = ..... 8 x 10 = .....
8 x 1 = 8 8 x 3 = 24 8 x 5 = 40 8 x 7 = 56 8 x 9 = 72
8 x 2 = 16 8 x 4 = 32 8 x 6 = 48 8 x 8 = 64 8 x 10 = 80
Tính
8 x 1 = ..... 8 x 2 = ..... 8 x 3 = ..... 8 x 4 = .....
1 x 8 = ..... 2 x 8 = ..... 3 x 8 = ..... 4 x 8 = .....
8 x 5 = ..... 8 x 6 = ..... 8 x 7 = ..... 8 x 8 = .....
5 x 8 = ..... 6 x 8 = ..... 7 x 8 = ..... 8 x 9 = .....
8 x 1 = 8 8 x 2 = 16 8 x 3 = 24 8 x 4 = 32
1 x 8 = 8 2 x 8 = 16 3 x 8 = 24 4 x 8 = 32
8 x 5 = 40 8 x 6 = 48 8 x 7 = 56 8 x 8 = 64
5 x 8 = 40 6 x 8 = 48 7 x 8 = 56 8 x 9 = 72
Tính nhẩm
8 x 1 =
8 x 5 =
8 x 0 =
8 x 8 =
8 x 2 =
8 x 4 =
8 x 6 =
8 x 9 =
8 x 3 =
8 x 7 =
8 x 10 =
8 x 1 = 8
8 x 5 = 40
8 x 0 = 0
8 x 8 = 64
8 x 2 = 16
8 x 4 = 32
8 x 6 = 48
8 x 9 =72
8 x 3 = 24
8 x 7 = 56
8 x 10 = 80
8 x 1 = 8
8 x 5 = 40
8 x 0 = 0
8
64
16
32
48
72
24
56 80
Tính nhẩm
8 x 3 =
8 x 2 =
8 x 4 =
8 x 1 =
8 x 5 =
8 x 6 =
8 x 7 =
0 x 8 =
8 x 8 =
8 x 10 =
8 x 9 =
8 x 0 =
Học sinh tự nhẩm và ghi như sau:
8 x 3 = 24
8 x 2 = 16
8 x 4 = 32
8 x 1 = 8
8 x 5 = 40
8 x 6 = 48
8 x 7 = 56
0 x 8 = 0
8 x 8 = 64
8 x 10 = 80
8 x 9 = 72
8 x 0 = 0
1.24
2.16
3.32
4.8
5.40
6.48
7.56
8.0
9.64
10.80
11.72
12.0
8 x 0 =
8 x 8 =
8 x 2 =
8 x 4 =
8 x 6 =
8 x 9 =
8 x 3 =
8 x 7 =
8 x 10 =
8 x 0 =0
8 x 8 =64
8 x 2 =16
8 x 4 =32
8 x 6 =48
8 x 9 =72
8 x 3 =24
8 x 7 =56
8 x 10 =80
8 x 0 =0
8 x 8 =64
8 x 2 =16
8 x 4 =32
8 x 6 =48
8 x 9 =72
8 x 3 =24
8 x 7 =56
8 x 10 =80
8 x 0 =0
8 x 8 =64
8 x 2 =16
8 x 4 =32
8 x 6 =48
8 x 9 =72
8 x 3 =24
8 x 7 =56
8 x 10 =80
8 x 1 =
8 x 2 =
8 x 3 =
8 x 4 =
8 x 5 =
8 x 6 =
8 x 7 =
8 x 8 =
8 x 9 =
8 x 10 =
8 x 1 =8
8 x 2 =16
8 x 3 =24
8 x 4 =32
8 x 5 =40
8 x 6 =48
8 x 7 =56
8 x 8 =64
8 x 9 =72
8 x 10 =80
8,16,24,32,40,48,56,64,72,80
tk cháu nhé ông
8x1=8
8x2=16
8x3=24
8x4=32
8x5=40
8x6=48
8x7=56
8x8=64
8x9=72
8x10=80
k cho mình nhé
chúc bạn học giỏi hơn nha
Tính nhanh các biểu thức sau :
a) (45 – 5 x 9) x 1 x 2 x 3 x 4 x 5 x 6 x 7
b) (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x (72 – 8 x 8 – 8)
c) (36 – 4 x 9) : (3 x 5 x 7 x 9 x 11)
d) (27 – 3 x 9) : 9 x 1 x 3 x 5 x 7
Ta có:
a) ( 45 – 5 x 9 ) x 1 x 2 x 3 x 4 x 5 x 6 x 7
= (45 – 45) x 1 x 2 x 3 x 4 x 5 x 6 x 7
= 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7
= 0
b) (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x (72 – 8 x 8 – 8)
= (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x (72 – 64 – 8)
= (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x 0
= 0
c) (36 – 4 x 9) : (3 x 5 x 7 x 9 x 11)
= (36 – 36) : (3 x 5 x 7 x 9 x 11)
= 0 : (3 x 5 x 7 x 9 x 11)
= 0
d) (27 – 3 x 9) : 9 x 1 x 3 x 5 x 7
= (27 – 27) : 9 x 1 x 3 x 5 x 7
= 0 : 9 x 1 x 3 x 5 x 7
=0
a) ( 45 – 5 x 9 ) x 1 x 2 x 3 x 4 x 5 x 6 x 7
= 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7
b) (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x (72 – 8 x 8 – 8)
= (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x 0
c) (36 – 4 x 9) : (3 x 5 x 7 x 9 x 11)
= 0 : (3 x 5 x 7 x 9 x 11)
d) (27 – 3 x 9) : 9 x 1 x 3 x 5 x 7
= 0 : 9 x 1 x 3 x 5 x 7 Nếu đúng thì k cho mình nhé bạn!
a. ( 45 – 5 x 9 ) x 1 x 2 x 3 x 4 x 5 x 6 x 7
= (45 – 45) x 1 x 2 x 3 x 4 x 5 x 6 x 7
= 0 x 1 x 2 x 3 x 4 x 5 x 6 x 7
= 0
b. (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x (72 – 8 x 8 – 8)
= (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x (72 – 64 – 8)
= (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10) x 0
= 0
c. (36 – 4 x 9) : (3 x 5 x 7 x 9 x 11)
= (36 – 36) : (3 x 5 x 7 x 9 x 11)
= 0 : (3 x 5 x 7 x 9 x 11)
= 0
d. (27 – 3 x 9) : 9 x 1 x 3 x 5 x 7
= (27 – 27) : 9 x 1 x 3 x 5 x 7
= 0 : 9 x 1 x 3 x 5 x 7
=0
1. tinh :
a) 15/8 + 3/4 - 5/12
b) 11/24 x 12/33 + 5/6
c) 15/8 + 7/24 : 5/8
2 . tim x, biet :
a) x + 5/8 : 3/4 = 17/9
b) x - 5/9 x 18/15 = 1/3
c) x x7/8 - 5/8 = 13/24
d) X x1/7 + X x 1/4 + X x 1/4 =18
giup mik nhanh nha. mik can gap lam
a)15/8+3/4-5/12
=45+18-10/24
=53/24
b)11/24.12/33+5/6
=11.12/12.2.11.3+5/6
=1/6+5/6
=6/6=1
c)15/8+7/24:5/8
=15/8+7/24.8/5
=15/8+7.8/3.8.5
=15/8+7/15
=đề sai, nếu đúng thì như này
=8/15+7/15
=15/15=1