Question

简算 5.6*69.32+138.64*0.05+693.2*0.43

Answer 1

5.6*69.32+138.64*0.05+693.2*0.43

=5.6*69.32+69.32*2*0.05+69.32*10*0.43

=5.6*69.32+69.32*0.1+69.32*4.3

=69.32*(5.6+0.1+4.3)

=69.32*10

=693.2