| 32×125×25 | 500-25-25-25-25-25-25-25-25-25-25 |
| 6300÷4÷25 | 35×72+35×27+35. |
=4×8×125×25,
=(8×125)×(25×4),
=1000×100,
=100000;
(2)500-25-25-25-25-25-25-25-25-25-25,
=500-(25+25+25+25+25+25+25+25+25+25),
=500-25×10,
=500-250,
=250;
(3)6300÷4÷25,
=6300÷(4×25),
=6300÷100,
=63;
(4)35×72+35×27+35,
=35×(72+27+1),
=35×100,
=3500.