1、4.8÷32 2、(6.4×0.75×81)÷(0.32×25×2.7) 3、264×0.0298—5.36×2.98—0.298
2个回答
展开全部
1、4.8÷32 =0.3×16÷16÷2=0.3÷2=0.15
2、(6.4×0.75×81)÷(0.32×25×2.7) =6.4÷0.32×0.75÷25×81÷2.7=20×0.03×30=18
3、264×0.0298—5.36×2.98—0.298=2.64×2.98—5.36×2.98—0.1×2.98=(2.64-5.36-0.1)×2.98=-2.82×2.98=-8.4036
4、(3.4×4.8×5.7)÷(1.9×1.7×2.4)
=3.4÷1.7×4.8÷2.4×5.7÷1.9
=2×2×3
=12
2、(6.4×0.75×81)÷(0.32×25×2.7) =6.4÷0.32×0.75÷25×81÷2.7=20×0.03×30=18
3、264×0.0298—5.36×2.98—0.298=2.64×2.98—5.36×2.98—0.1×2.98=(2.64-5.36-0.1)×2.98=-2.82×2.98=-8.4036
4、(3.4×4.8×5.7)÷(1.9×1.7×2.4)
=3.4÷1.7×4.8÷2.4×5.7÷1.9
=2×2×3
=12
展开全部
1、4.8÷32 =0.3×16÷16÷2=0.3÷2=0.15
2、(6.4×0.75×81)÷(0.32×25×2.7) =6.4÷0.32×0.75÷25×81÷2.7=20×0.03×30=18
3、264×0.0298—5.36×2.98—0.298=2.64×2.98—5.36×2.98—0.1×2.98=(2.64-5.36-0.1)×2.98=-2.82×2.98=-8.4036
4、(3.4×4.8×5.7)÷(1.9×1.7×2.4)
=3.4÷1.7×4.8÷2.4×5.7÷1.9
=2×2×3
=12
2、(6.4×0.75×81)÷(0.32×25×2.7) =6.4÷0.32×0.75÷25×81÷2.7=20×0.03×30=18
3、264×0.0298—5.36×2.98—0.298=2.64×2.98—5.36×2.98—0.1×2.98=(2.64-5.36-0.1)×2.98=-2.82×2.98=-8.4036
4、(3.4×4.8×5.7)÷(1.9×1.7×2.4)
=3.4÷1.7×4.8÷2.4×5.7÷1.9
=2×2×3
=12
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