a)(-4)x(-9)
b)32x(-3)
c)-20x17
d)-1/4x2 e)-4,2x(-5) f)(-0,8)x(-500)
g)1 2/5x(-9/14)
h)-3 1/9 x2 1/7
i) -5,4 x (0,03)
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a) 36
b) -108
c) -340
d) - 1/2
e) 21
f) 400
g) -9/10
h) -60/9
i) - 0,162