40X(16十25丿怎样简便算快点你是猫?

2025-06-28 10:37:03
推荐回答(2个)
回答1:

=40x(40+1)
=40x40+40x1
=1600+40
=1640

回答2:

用乘法分配率,等于40×16+40×25