问题 解答题
脱式计算,能简便的要用简便方法计算.
0.36×1.5×0.4
0.05×3.2×4026×15.7+15.7×74
3.78×0.5-0.653.98+13.4×0.24(9.37+9.37+9.37+9.37)×2.5.
答案

(1)0.36×1.5×0.4,

=0.36×(1.5×0.4),

=0.36×0.6,

=0.216;

(2)0.05×3.2×40,

=(0.05×40)×3.2,

=2×3.2

=6.4;

(3)26×15.7+15.7×74,

=(26+74)×15.7,

=100×15.7,

=1570;

(4)3.78×0.5-0.65,

=1.89-0.65,

=1.24;

(5)3.98+13.4×0.24,

=3.98+3.216,

=7.196;

(6)(9.37+9.37+9.37+9.37)×2.5,

=9.37×4×2.5,

=9.37×(4×2.5),

=9.37×10,

=93.7.

单项选择题
单项选择题 A1/A2型题