Bai 1 :
a) ( 6/5 + 7 ) x 9 b) 7/4 x 8 + 7/4 x 2
Bai 2 :
a) X : 1/4 = 6 b) 1/4 : X = 6
c) 1x2x3x4
_______ x X = 1 d) X x 3/4 + 2 = 3
5x6x7x8
e) X : 7/5 - 1 = 6 g) X : 7/5 X 8 = 8
BAI 3
ngoc doc 1 quyen sach 450 trang , ngay thu nhat doc 1/3 , ngay thu 2 doc 2/5 quyen sach ,
a) tim phan so chi phan chua doc ?
b) tim so trang ban ngoc chua doc la ?
may tinh minh bi hu nen ko viet dau duoc cac ban thong cam nha , minh dang can gap mi minh minh phai nop roi
ai lam nhanh va dung minh tick cho !!!!!!!!!!!!!!!!