问题 解答题
用简便方法计算.
125×32×2556×53+56×48-56102×15
1050÷15÷712.36-5.64-4.361.29+3.7+0.71+6.3.
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.

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