18åä¹13X5.16+516%X18åä¹5
=ï¼13/18+5/18ï¼Ã5.16
=1Ã5.16
=5.16
75%X1.375+5.625X75%+0.75
=3/4Ãï¼1.375+5.625+1ï¼
=3/4Ã8
=6
3åä¹1÷4 +6åä¹5X2åä¹1
=1/12+5/12
=1/2
3åä¹1+4åä¹1X2+4åä¹3X3åä¹2
=1/3+ï¼1/2+1/2ï¼
=1/3+1
=1å1/3
9åä¹8X4åä¹3÷3åä¹2
=ï¼8/9÷2/3ï¼Ã3/4
=4/3Ã3/4
=1
5åä¹4÷8÷20åä¹1
=4/5÷ï¼8Ã1/20ï¼
=4/5÷2/5
=2
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