5又3/4-(2又1/6+0.5) 3/4×(2.5-1/4)+5/12÷0.25 己知:x:125又3/4-(2又1/6+0.5)3/4×(2.5-1/4)+5/12÷0.25己知:x:12又1/2=2.4:3求比值

5又3/4-(2又1/6+0.5) 3/4×(2.5-1/4)+5/12÷0.25 己知:x:125又3/4-(2又1/6+0.5)3/4×(2.5-1/4)+5/12÷0.25己知:x:12又1/2=2.4:3求比值
5又3/4-(2又1/6+0.5) 3/4×(2.5-1/4)+5/12÷0.25 己知:x:12
5又3/4-(2又1/6+0.5)
3/4×(2.5-1/4)+5/12÷0.25
己知:x:12又1/2=2.4:3求比值

5又3/4-(2又1/6+0.5) 3/4×(2.5-1/4)+5/12÷0.25 己知:x:125又3/4-(2又1/6+0.5)3/4×(2.5-1/4)+5/12÷0.25己知:x:12又1/2=2.4:3求比值
1∶12 1／2=2∶4∶3
x=12 1／2×2·4∶3
x=10

5又3/4-(2又1/6+0.5)
=5-2+(3/4-1/6-1/2)
=3+1/12
=3又1/12
3/4×(2.5-1/4)+5/12÷0.25
=3/4×9/4+5/12×4
=27/16+5/3
=161/48
己知:x:12又1/2=2.4:3求比值
x=12又1/2×2.4:3
x=10