19 x 1 = 19
19 x 2 = 38
19 x 3 = 57
19 x 4 = 76
19 x 5 = 95
19 x 6 = 114
19 x 7 = 133
19 x 8 = 152
19 x 9 = 172
19 x 10 = 190
Hok tốt ah
MẸO HEN
NẾU DÒNG THẲNG TẮP NHƯ VẦY
9 x 1
9 x 2
9 x 3
9 x 4
9 x 5
9 x 6
9 x 7 6 3
9 x 8 7 2
9 x 9 8 1
9 x 1=9 0
19 x 1 = 19
19 x 2 = 38
19 x 3 = 57
19 x 4 = 76
19 x 5 = 95
19 x 6 = 114
19 x 7 = 133
19 x 8 = 152
19 x 9 = 172
19 x 10 = 190
Hok tốt ah
MẸO HEN
NẾU DÒNG THẲNG TẮP NHƯ VẦY
9 x 1
9 x 2
9 x 3
9 x 4
9 x 5
9 x 6
9 x 7 6 3
9 x 8 7 2
9 x 9 8 1
9 x 1=9 0
tính nhanh
17/19+27/35-17/19+1
1/3x 4/5 + 1/3 x 6/5 +2/3
4/7 x 2/9 + 4/7 x 7/9 + 2/3
19 và 5/8 : 7/12 - 15 và 1/4 : 7/12
* 19 và 5/8 là hỗn số *
a) 3 x X x 2/3 = 4/5
b) 3,94 x 18,24 + 18,24 x 3,72 + 18,24 x 2,34
c) 8/9 + 14/27 + 1/9 + 13/27
d) 8/19 x 2/7 + 8/19 x 1/7 + 8/19 x 4/7
tính nhanh
25/37 x 18/29 + 18/29 x 12/37
31/85 x 11/19 + 31/85 x 12/19 - 42/19 x 31/85
c , 16/53 : 17/9 - 16/53 : 17/8
1/5 x 12/31 x 4/3 + 19/31 x 4/15
5/6 x 4/19 + 7/12 x 4/19 + 18/19
Giúp vs
2/3 x 5/19 + 2/23 x 3/19 + 2/23 x 11/19
7/4 - x . 3/4 = 5/19
x : 5/4 = 5/19
[ x + 3/4 ] . 5/7 = 10/9
12/5 : x + 4/3 = 3 2/3
x. 4/5 : 2 = 6/7
x + 20/11.13 + 20/13.15 + 20/15 . 17 + ... + 20/53.55 = 2/4
3/11 x 7/19 + 3/11 x 17/19 - 3/11 x 24/19
bài 2: kết quả phép tính \(\dfrac{7}{19}\) x \(\dfrac{1}{3}\) + \(\dfrac{7}{19}\) x \(\dfrac{2}{3}\)=
a. \(\dfrac{14}{21}\)
b.\(\dfrac{21}{19}\)
c.\(\dfrac{14}{57}\)
d.\(\dfrac{7}{19}\)
\(\dfrac{7}{19}\) x \(\dfrac{1}{3}\) + \(\dfrac{7}{19}\)x \(\dfrac{2}{3}\)