158+(-151)-85+12
=(158+(-151))-(-85+12)
=7+-73
=-66
158+(-151)-85+12
=(158+(-151))-(-85+12)
=7+-73
=-66
1 thuc hien phep tinh
151 -2 mu 91 : 2 mu 88 + 1 mu 2 . 3
thuc hien phep tinh
C=85+87+89+......+2013+2015
thuc hien phep tinh
73 . 35 + 27 . 19 - 20 . 73 + 81 . 27 + 85 . 73
thuc hien phep tinh
B=10+12+14+....+96+98
1/4 - 1/3+ 5/12 Thuc hien cac phep tinh (tinh hop li neu co the)
Bai 1: thuc hien phep tinh
A,17×85+15×17-120
B,75-(3×52-4×23)
C,A=12:{390:[500-(125+35×7)]}
D,B=10+12+14+........96+98
Ghi ro loi giai ra nhe !! Lam dung minh tick cho
1 thuc hien phep tinh
a] [3/8cong am3/4cong7/12] chia 5/6cong 1/2
thuc hien phep tinh
(3^15 + 3^16 + 3^17) : (3^11 + 3^12 + 3^13) = ?
giup minh nha
thuc hien phep tinh:
a, -3+(-13)
b, (-51).12+12.(-49)
c, 317-12+8+(-217)
d, 25.(27-39)-27.(25-39)