用简便方法计算. 569+68+132+31 125×88 2300-165-35 125×(8+4) 3200÷25÷4 156×l0l-15

用简便方法计算. 569+68+132+31 125×88 2300-165-35 125×(8+4) 3200÷25÷4 156×l0l-156.

(1)569+68+132+31,
=(569+31)+(68+132),
=600+200,
=800;

(2)125×88,
=(125×8)×11,
=1000×11,
=11000;

(3)2300-165-35,
=2300-(165+35),
=2300-200,
=2100;

(4)125×(8+4),
=125×8+125×4,
=1000+500,
=1500;

(5)3200÷25÷4,
=3200÷(25×4),
=3200÷100,
=32;

(6)156×l0l-156,
=156×(101-1),
=156×100,
=15600.

温馨提示:答案为网友推荐,仅供参考