7.8*7.8-6.8-7.8简便计算

2025-05-18 03:19:13
推荐回答(3个)
回答1:

7.8×7.8-6.8-7.8
=7.8×(7.8-1)-6.8
=7.8×6.8-6.8
=6.8×(7.8-1)
=6.8×6.8
=46.24

回答2:

=7.8x(7.8-1)-6.8
=7.8x6.8-6.8
=6.8x(7.8-1)
=6.8x6.8
=(7-0.2)x6.8
=47.6-1.36
=46.24

回答3:

=7.8×(7.8-1)-6.8
=7.8×6.8-6.8
=(7.8-1)×6.8
=6.8×6.8
=46.24