a,35x34+35x86+65x75+65x45
=35x(34+86)+65x(75+45)
=35x120+65x120
=120x(35+65)
=120x100
=12000
b,3x25x8+4x37x6+2x38x12
=(3x8)x25+(4x6)x37+(2x12)x38
=24x25+24x37+24x38
=24x(25+37+38)
=24x(62+38)
=24x100
=2400
c,12x53+53x172-53x84
=53x(12+172-84)
=53x(184-84)
=53x100
=5300
a.35x(34+86)+65x(75+45)=35x120+65x120=120x(35+65)=120x100=12000
b.3x25x8+4x37x6x2x38x12=24x25+24x37+24x38=24x(25+37+38)=24x100=2400
c.53x(12+172-84)=53x100=5300
a) 35x34+35x86+65x75+65x45
=35.(34+86)+65.(75+45)
=35.120+65.120
=120.(35+65)
=120.100
=12 000
b) 3x25x8+4x37x6+2x38x12
=75.8+148.6+76.12
= 600+888 +912
=2400
c)12x53+53x172-53x84
=53.(12+172-84)
=53.100
=5300
Học Tốt ! #Moon#
