191X30 80X3的简便运算是什么?

2025-03-31 21:46:49
推荐回答(4个)
回答1:

=191*30+8*30

=30*(191+8)

=30*(200-1)

=6000-30

=5970

希望你能采纳

回答2:

191×30+80×3
=191×30+8×30
=(191+8)×30
=199×30
=(200-1)×30
=200×30-1×30
=6000-30
=5970

回答3:

30×(191+9)-30×1
=6000-30
=5970

回答4:

191×30+80×3
=(100+91)×30+80×3
=3000+2730+240
=5970