\(a,1200+440\)
\(=1200+400+40\)
Ta thấy: \(1200⋮4\)
\(400⋮4\)
\(40⋮4\)
\(\Rightarrow1200+400+40⋮4\)
hay \(1200+440⋮4\)
\(b,400-324\)
\(=400-320-4\)
Ta thấy: \(400⋮4\)
\(320⋮4\)
\(4⋮4\)
\(\Rightarrow400-320-4⋮4\)
hay \(400-324⋮4\)
\(c,\) Ta thấy: \(2\cdot3\cdot4\cdot6⋮4\)
\(27⋮̸4\)
\(\Rightarrow2\cdot3\cdot4\cdot6+27⋮̸4\)
#Toru
1200 ⋮ 4
440 ⋮ 4
Vậy (1200 + 440) ⋮ 4
------------
400 ⋮ 4
324 ⋮ 4
Vậy (400 - 324) ⋮ 4
------------
2.3.4.6 ⋮ 4
27 không chia hết cho 4
Vậy (2.3.4.6 + 27) không chia hết cho 4