问题
解答题
简便计算
①2.5×3.7×4
②3.14×43+72×3.14-150×0.314.
答案
①2.5×3.7×4,
=(2.5×4)×3.7,
=10×3.7,
=37;
②3.14×43+72×3.14-150×0.314,
=3.14×43+72×3.14-15×3.14,
=(43+72-15)×3.14,
=100×3.14,
=314.
简便计算
①2.5×3.7×4
②3.14×43+72×3.14-150×0.314.
①2.5×3.7×4,
=(2.5×4)×3.7,
=10×3.7,
=37;
②3.14×43+72×3.14-150×0.314,
=3.14×43+72×3.14-15×3.14,
=(43+72-15)×3.14,
=100×3.14,
=314.