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