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=13/4+16/3:4
=13/4+16/3x1/4
=13/4+4/3
=39/12+16-12
=55/12=4 7/12=4,58
= 13/4 + 16/3 ÷ 4
= 13/4 + 16/3 ×1/4
= 13/4 + 4/3
= 39/12 + 16/12
= 55/12
= 4 7/12