Các câu hỏi tương tự
tinh nhanh 4/5 nhan 3/5 cong 4/5 nhan 6/7 tru 4/14 nhan 1/5
tinh nhanh 4 phan 5 cong 2 phan 7 cong 11 phan 5 cong 12 phan 7 cong 1 phan 5
Bai:2 Tinh
a)3/5 + 4/7
b)2/3 - 3/9
c)2/5 * 8/11
d)3/7 : 5/14
e)3/8 + 6/15 :3/5
3 Tinh
6/5-1/5 cong 1/4
1/2-1/4 cong 2/3
3/5 cong 4/9 -1/3
de bai tinh nhanh 2017 * 99 cong 2 * 2017 tru 2017
bai 1; 2/5 + 1/2 + 7/10 ; 4/9 + 11/8 - 5/6 ; 9/20 - 8/15 * 5/12
bai 2 ; 2/5 + 3/10 - 1/2 ; 8/11 + 8/33 * 3/4
bai 3 ; x - 3/4 = 1/2 ;
bai 4 ; tinh chu vi hinh chu nhat co chieu dai 4/5 m va chieu rong 2/3 m
Bai 1 : tinh
a . 6/7 + 5/8 : b. 3/5 - 3/8 ; c. 1/4 + 5/6 ; d. 4/9 - 1/6
Bai 2 : tinh
a. 3 + 2/5 ; b. 4 - 5/7 ;
c. 1 - [2/5 + 1/3] .
tinh tong cac so chia het cho 4
tinh nhanh
3 cong 8 cong 13 cong ...cong 48
1 cong 3 cong 5 cong 7 cong ...2021
tinh nhanh
1/4*3+1/5*4+1/6*5+1/7*6=