①38×37分之19
=(37+1)×19/37……变一变,就简便
=37×19/37+19/37
=19+19/37
19又19/37
②29×30分之13
=(30-1)×13/30
=30×13/30-13/30
=13-13/30
=12又17/30
③800÷25
=(800×4)÷(25×4)……商不变的性质
=3200÷100
=32
④16÷0.125
=(16×8)÷(0.125×8)……商不变的性质
=128÷1
=128
⑤0.75×18÷0.15
=(0.75÷0.15)×18
=5×18
=90
⑥4.8×0.25
=1.2×(4×0.25)……变一变,就简便
=1.2×1
=1.2