例题应用了商不变规律进行了简算.
800÷25
=(800×4)÷(25×4),
=3200÷100,
=32;
600÷25
=(600×4)÷(25×4),
=2400÷100,
=24;
2000÷125
=(2000×8)÷(125×8),
=16000÷1000,
=16;
9000÷125
=(9000×8)÷(125×8),
=72000÷1000,
=72.
例题应用了商不变规律进行了简算.
800÷25
=(800×4)÷(25×4),
=3200÷100,
=32;
600÷25
=(600×4)÷(25×4),
=2400÷100,
=24;
2000÷125
=(2000×8)÷(125×8),
=16000÷1000,
=16;
9000÷125
=(9000×8)÷(125×8),
=72000÷1000,
=72.