简算:
(1)1.25×0.15×8
=1.25×8×0.15
=10×0.15
=1.5
(2)36×(5/18+4/9)
=36×5/18+36×4/9
=10+16
=26
(3)13.8-1/3-2/3
=13.8-(1/3+2/3)
=13.8-1
=12.8
(4)9.6×4.5+4.5×9.6+9.6
=9.6×(4.5+4.5+1)
=9.6×10
=96
脱式计算:
(1)(1.2+2.4×1.5)÷2.4
=1.2÷2.4+3.4×1.5÷2.4
=0.5+1.5
=2
(2)1.56÷[(2.5-1.2)×2.4]
=1.56÷[1.3×2.4]
=1.56÷1.3÷2.4
=1.2÷2.4
=0.5
(3)45÷[(4/5-2/3)×1.5]
=45÷[2/15×1.5]
= 45÷1/5
=225
(4)(2-1/4×2/3)×(6/5-2/3)
=(2-1/6)×8/15
=11/6×8/15
=44/45