a, 32 x 35 + 32 x 65 b, 150 : [ 25 x ( 18- 42)]
= 32 x ( 35 +65) = 150 : [ 25 x ( 18-16)]
= 9 x 100 = 150 : ( 25 x 2)
= 900 = 150 : 50 = 3
c, 57 : 54 - 21 x 22
= 53- 2 x 4
= 125-8
=117
a) 3 ^ 2 x 35 + 3 ^ 2 x 65 = 9 x 35 + 9 x 65 = 9 x ( 65 + 35 ) = 9 x 100 = 900
a)3^2.35+3^2.65
=3^2.(35+65)
=9.100
=900
b)150:{25.(18-4^2)}
=150:{25.2}
=150:50
=3
c)5^7:5^4-2^1.2^2
5^3-2^3
=3^3=27