简便计算2.2+(4.72-2.8)÷0.4,(8.25-3.75)÷2.5÷4

2025-02-27 06:46:52
推荐回答(1个)
回答1:

2.2+(4.72-2.8)÷0.4
=2.2+1.92÷0.4
=2.2+4.8
=7

(8.25-3.75)÷2.5÷4
=4.5÷2.5÷4
=4.5÷(2.5×4)
=4.5÷10
=0.45