13乘以5分之4加上3除以4分之5减去4怎样简算
问题描述:
13乘以5分之4加上3除以4分之5减去4怎样简算
答
13乘以5分之4加上3除以4分之5减去4
=13×4/5+3×4/5-4
=(13+3)×4/5-4
=16×4/5-4
=12.8-5
=8.8