题目内容
计算：0.123×958958+877×613.613-34.5×1231.23（ ）
| A、613613 | B、6136.13 | C、61361.3 | D、以上答案都不对 |
分析：根据数字特点，运用拆分的方法，原式变为0.123×1001×958+877×613×1.001-34.5×123×10.01，进一步转化，运用乘法分配律简算．
解答：解：0.123×958958+877×613.613-34.5×1231.23
=0.123×1001×958+877×613×1.001-34.5×123×10.01
=123×1001×0.958+877×0.613×1001-0.345×123×1001
=1001×123×（0.958-0.345）+877×0.613×1001
=1001×0.613×（123+877）
=1001×1000×0.613
=613613
故选：A．
=0.123×1001×958+877×613×1.001-34.5×123×10.01
=123×1001×0.958+877×0.613×1001-0.345×123×1001
=1001×123×（0.958-0.345）+877×0.613×1001
=1001×0.613×（123+877）
=1001×1000×0.613
=613613
故选：A．
点评：此题解答的关键在于利用积不变的原理，运用转化的数学思想，运用运算定律简算．
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