Question

简便运算：1.86×3.6+4.4

Answer 1

=1.8×3.6+0.06×3.6+4.4

=(2-0.2)×3.6+0.06×(3+0.6)+4.4

=7.2-0.72+0.18+0.036+4.4

=11.096

哎,不太对,越算越复杂了