a) Tinh gia tri bieu thuc:
3/5 : 4/5 + 1/2 x 2/3
b) Tim x:
5/4 nhan x = 3/8 + 1/4
Tinh gia tri cua bieu thuc:
a, 4+11/8-5/6=
b, (1/2+4/7)-(3/7-3/10)=
Tinh gia tri bieu thuc [m + n ]:p neu m=5,n=19 va p=3 .Vay gia tri bieu thuc la:
bai 1 tinh gia tri cua bieu thuc 78 x m + 22 x m voi m =135
bai 2 tinh gia tri cua bieu thuc 78 x m + 42 x m -20 x m voi m =1035
bai 3 cho bieu thuc B = 119 x n - n x 9 bieu thuc B co gia tri bang 8470 khi n =............
bai2: tinh gia tri cua bieu thuc: 5/6+1/3*2 bang bao nhieu
giup minh voi
tinh gia tri bieu thuc [12x2:2]-5
Tinh gia tri cua bieu thuc : 3789÷ 3 - 365 × n voi n = 2
tinh gia tri bieu thuc sau bang hai cach:
a,1/2 x 1/3+1/3 x1/5
b,{2/5+3/10} x 1/2
tinh gia tri cua bieu thuc: a, 8/5+3/8:2/3=
b, 1/72x144/23+1/46=
