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简介:
(1)420÷35
=(420÷7)÷(35÷7)
=60÷5
=12
(2)900÷25
=(900×4)÷(25×4)
=3600÷100
=36
(3)3400÷25
=(3400×4)÷(25×4)
=13600÷100
=136
(4)700÷25
=(700×4)÷(25×4)
=2800÷100
=28
(5)7700÷700
=(7700÷100)÷(700÷100)
=77÷7
=7
(6)800÷25
=(800×4)÷(25×4)
=3200÷100
=32
(7)2600÷50
=(2600×2)÷(50×2)
=5200÷100
=52
(8)1600÷25
=(1600×4)÷(25×4)
=6400÷100
=64