125×103-125×3&nbs

发布时间:2020-08-09 23:22:28

125×103-125×3                  2700-425-175                    125×8841+127+59+173                  1300÷25÷4                       156×l0l-156.

网友回答

解:(1)125×103-125×3,
=125×(103-3),
=125×100,
=12500;

(2)2700-425-175,
=2700-(425+175),
=2700-600,
=2100;

(3)125×88,
=125×8×11,
=1000×11,
=11000;

(4)41+127+59+173,
=(41+59)+(127+173),
=100+300,
=400;

(5)1300÷25÷4,
=1300÷(25×4),
=1300÷100,
=13;

(6)156×l0l-156,
=156×(101-1),
=156×100,
=15600.
解析分析:(1)运用乘法分配律简算;
(2)根据连续减去两个数等于减去这两个数的和简算;
(3)把88分解成8×11,再运用乘法结合律简算;
(4)运用加法结合律简算;
(5)根据连续除以两个数,等于除以这两个数的积简算;
(6)把156看成156×1,然后使用乘法分配律简算.


点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.
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