这样写:
=5.5÷1/5+4.5×5
=5.5×5+4.5×5
=(5.5+4.5)×5
=10×5
=50
原式=5.5×5+4.5×5
=(5.5+4.5)×5
=10×5
=50
原式
=5.5÷1/5+4.5×5
=5.5×5+4.5×5
=5×(5.5+4.5)
=5×10
=50
5.5/0.2+4.5×5
=55/2+(4.5×10)/2
=55/2+45/2
=100/2
=50.
(4.5+1)÷1/5+4.5×5
=(4.5+1)×5+4.5×5
=4.5×5+1×5+4.5×5
=4.5×5×2+1×5
=9×5+1×5
=(9+1)×5
=50