Question

456＋109 和 456－109 怎么简算

Answer 1

456＋109

=(450+6)+(100+9)

=450+6+100+9

=(450+100)+(6+9)

=550+15

=565

456－109

=(450+6)-(100+9)

=450+6-100-9

=(450-100)+(6-9)

=350-3

=347