?=125×8+125×4? ?=1000+500? ?=1500?
?=125×8×4? ?=1000×4? ?=4000?
=64×(99+1)? ?=64×100? ?=6400?
?=64×100-64? ?=6400-64? ?=6336?
?=85×(101-1)? ?=85×100? ?=8500?
?=85×100+85? ?=8500+85? ?=8585?
?=510÷(2×5)? ?=510÷10? ?=51?
?=270÷(45×2)? ?=270÷90? ?=3?
?=45×(102-2)? ?=45×100? ?=4500?
?=54×(176-76)? ?=54×100? ?=5400?
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