问题
解答题
用简便方法计算.
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答案
(1)125×32×25,
=125×(4×8)×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(2)56×53+56×48-56,
=56×(53+48-1),
=56×100,
=5600;
(3)102×15,
=(100+2)×15,
=100×15+2×15,
=1500+30,
=1530;
(4)1050÷15÷7,
=1050÷(15×7),
=1050÷105,
=10;
(5)12.36-5.64-4.36,
=12.36-(5.64+4.36),
=12.36-10,
=2.36;
(6)1.29+3.7+0.71+6.3,
=(1.29+0.71)+(3.7+6.3),
=2+10,
=12.