题目内容
用简便方法计算.
8×26×125
138+29+262
78000÷4÷25.
8×26×125
138+29+262
78000÷4÷25.
分析:(1)运用乘法交换律简算;
(2)运用加法交换律简算;
(3)根据减法的性质简算.
(2)运用加法交换律简算;
(3)根据减法的性质简算.
解答:解:(1)8×26×125
=8×125×26
=1000×26
=26000;
(2)138+29+262
=138+262+29
=400+29
=429;
(3)78000÷4÷25
=78000÷(4×25)
=78000÷100
=780.
=8×125×26
=1000×26
=26000;
(2)138+29+262
=138+262+29
=400+29
=429;
(3)78000÷4÷25
=78000÷(4×25)
=78000÷100
=780.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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