5.4×9.9 1.2×5.4-5.4的简便计算

Question

如题所述

Answer 1

5.4×9.9+1.2×5.4-5.4
=5.4x(9.9+1.2-1)
=5.4x(10+0.1)
=5.4x10+5.4x0.1
=54+0.54
=54.54

Answer 2

5.4×9.9 +1.2×5.4-5.4
=5.4x(9.9+1.2-1)
=5.4x(1+0.1)
=5.4+0.54
=5.94

Answer 3

5.4*9.9
=5.4*10-5.4*0.1
=54-0.54
=53.46

1.2*5.4-5.4
=5.4*(1.2-1)
=5.4*0.2
=1.08