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简介:
2000÷125
=(2000×8)÷(125×8)
=16000÷1000
=16
150÷25
=(150×4)÷(25×4)
=600÷100
=6
180÷45
=(180×2)÷(45×2)
=360÷90
=4
120÷15
=(120×2)÷(15×2)
=240÷30
=8
240÷12
=(240÷6)÷(12÷6)
=40÷2
=20
210÷42
=(210÷7)÷(42÷7)
=30÷6
=5
180÷45
=(180÷9)÷(45÷9)
=20÷5
=4
450÷18
=(450÷9)÷(18÷9)
=50÷2
=25