(-12)×(-2分之1-3分之2+4分之1)

2025-06-22 14:57:57
推荐回答(1个)
回答1:

(-12)×(-2分之1-3分之2+4分之1)
=12×(1/2+2/3-1/4)
=12×1/2+12×2/3-12×1/4
=6+8-3
=11