a) 3x52+15x22-26:3
=3x25+15x4-26/3
=75+60-26/3
=135-26/3
=379/3
b) 53x2-100:4+23x5
=125x2-25+8x5
=250-25+40
=225+40
=265
c) 62:9+50x2- 33x3
=36:9+100-39
=4+100-19683
=104-19683
=19579
d) 32x5+23x10-81:3
=9x5+8x10-27
=45+80-27
=125-27
=98
Làm lại câu a nhé!
a) 3x52+15x22-26:2
=3x25+15x4-13
=75+60-13
=135-13
=122