60-25×4.5×0.4,
=60-25×0.4×4.5,
=60-10×4.5,
=60-45,
=15.
3×(150-1530÷15),
=3×(150-102),
=3×48,
=144.
8
9 ÷[(
2
5 +
1
10 )×
3
4 ],
=
8
9 ÷[(
4
10 +
1
10 )×
3
4 ],
=
8
9 ÷[
1
2 ×
3
4 ],
=
8
9 ÷
3
8 ,
=
8
9 ×
8
3 ,
=
64
27 .
60-25×4.5×0.4,
=60-25×0.4×4.5,
=60-10×4.5,
=60-45,
=15.
3×(150-1530÷15),
=3×(150-102),
=3×48,
=144.
8
9 ÷[(
2
5 +
1
10 )×
3
4 ],
=
8
9 ÷[(
4
10 +
1
10 )×
3
4 ],
=
8
9 ÷[
1
2 ×
3
4 ],
=
8
9 ÷
3
8 ,
=
8
9 ×
8
3 ,
=
64
27 .