问题
解答题
用简便方法计算.
|
答案
①3.4×0.46+3.4×0.54,
=3.4×(0.46+0.54),
=3.4×1,
=3.4;
②[18.95-﹙8.43+3.87﹚]×2,
=[18.95-12.3]×2,
=18.95×2-12.3×2,
=37.9-24.6,
=13.3.
用简便方法计算.
|
①3.4×0.46+3.4×0.54,
=3.4×(0.46+0.54),
=3.4×1,
=3.4;
②[18.95-﹙8.43+3.87﹚]×2,
=[18.95-12.3]×2,
=18.95×2-12.3×2,
=37.9-24.6,
=13.3.