Question

tentem calcular mentalmente:
a) 4.236×245≈?

b)100.542.057×432

c)332.465.123×109

Answer 1

a)4.236x245= 1.037.820
b)100.542.057x432= 43.434.168.624
c)332.465.123x109= 36.238.698.407 
=)