43✘7+43✘7简便方法？

Question

如题所述

Answer 1

43×7+43×7
=43×7×2
=86×7
=（80+6）×7
=80×7+6×7
=560+42
=602

Answer 2

=43×7×2
=301×2
=602

Answer 3

123×7×77×7