(1)
=
=
=
(2)
=
=
=3; (3)55×
=30-8, =22; (4)0.125×32×2.5, =0.125×(4×8)×2.5, =(0.125×8)×(4×2.5), =1×10, =10; (5)99.9+0.12+0.1+0.88, =(99.9+0.1)+(0.12+0.88), =100+1, =101; (6)9+99+999+9×
=9+99+999+3, =9+99+999+(1+1+1), =(9+1)+(99+1)+(999+1), =10+100+1000, =1110. |