6.8×9.9用简便计算

2025-03-27 23:41:05
推荐回答(3个)
回答1:

6.8×9.9
=6.8×(10-0.1)
=68-0.68
=67.32

回答2:

6.8×9.9
=6.8×10-6.8×0.1
=68-0.68
=67.32

回答3:

=6.8×(10-0.1)
=68-0.68
=67.32