75乘以27加19乘以25用简便方法计算

75乘以27加19乘以25用简便方法计算

75*27+19*25
=25*3*27+19*25
=25*(81+19)
=25*100
=2500

66乘以21加19乘以21加85乘以19用简便方法计算

66x21+19x21+85x19
=(66x21+19x21)+85x19
=(66+19)x21+85x19
=85x21+85x19
=85x(21+19)
=85x40
=3400

用简便方法计算76乘以25加25乘以24

用简便方法计算76乘以25加25乘以24
76乘以25加25乘以24
=25*（76+24）
=25*100
=2500

450乘以27加55乘以270简便方法计算?

450乘以27加55乘以270简便方法计算?
=270x(45+55)
=270x100
=27000

450乘以27加270乘以55简便方法计算?

450乘以27加270乘以55简便方法计算?
=270x(45+55)
=270x100
=27000

75乘以799加75用简便方法计算

75×799 +75
=75×（799+1)
=75×800
=60000

32乘以25乘以125用简便方法计算

32×25×125
=（4×8）×25×125
=（4×25）×（8×125）
=100×1000
=100000

70乘以25加85乘以75加15乘以25简便计算

解： 75×25+85×75+15×25
=75×25+85×75+15×(100-75)
=75×25+85×75+15×100-15×75
=75×(25+85-15)+1500
=75×(100-5)+1500
=75×100-75×5+1500
=7500-375+1500
=8625
启示：做此类题，充分利用加减乘除中的交换律，结合律，分配率。

25乘以56乘以4乘以2简便方法计算。

25乘以56乘以4乘以2
=（25×4）×（56×2）
=100×112
=11200