Question

36.7+3.3×1.2+0.4简便计算

Answer 1

解题过程如下

36.7＋3.3×1.2＋0.4

=36.7＋3.3×(0.4x3)+0.4

=36.7＋（3.3x3）x0.4＋0.4

=36.7＋9.9x0.4＋0.4x1

=36.7＋(9.9＋1）x0.4

=36.7＋(10＋0.9)x0.4

=36.7＋10x0.4＋0.9x0.4

=36.7＋4＋0.36

=41.06

温馨提示

此题需要反复运用乘法分配律。

Answer 2

解:运用乘法分配律将1.2化为(1+0.2)同3.3分别相乘，然后运用加法结合律，将(3.3ⅹ1.2)与0.4结合相加，最后再与36.7相加。计算过程
36.7+3.3ⅹ1.2+0.4
=36.7+[3.3x(1+0.2)+0.4]
=36.7+(3.3+0.66+0.4)
=36.7+4.36
=41.06。