b/ 2².5²-3⁵:3³
=> 4×25 - 3² = 100 - 9 = 91
c/ 80-[130-(12-4)²
=80 - (130 - 8²)
=80 - ( 130 - 64 )
=80 - 66
=15
d/100:{2.[52-(35-8)]}
100:{2.(52-27)}
100:(2× 25)
100:50 = 2
e/ (+25)+1945+(+75)+(+1945)
25+1945+75+1945
100 +3890 = 3990
Bài 2:
a) 160 - (2³.5²-6.25)
160 - ( 8×25 - 150 )
160 - ( 200 - 150)
160 - 50
110
b)4.5²-32:24 ( CÁI NÀY SAI NÈ REEEEEEE)
c)5871:[928-(247-82).5]
5871 : (928 - 165×5)
5871 : 103 = 57
Bài 3:
a)27.39+27.63-2.27
27×( 39 + 63 - 2 )
27×100 = 2700
b)48.19+48.115+134.52
48×(19+ 115) + 134×52
134×48 + 134×52
134×(48 + 52)
134× 100 = 13400
c)35.23+35.41+64.65
35×( 23 + 41) + 64×65
35×64 + 64×65
64×( 35 + 65)
64 × 100 = 6400