31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/03 01:35:57

31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3

31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
=94/3*83/2-34/3*83/2*2-19/2*34/3
=1/6(94*83-34*83-34*83-19*34)
=1/6[83*(94-34)-34*(83+19)]
=1/6(83*60)-1/6(34*102)
=83*10-34*17=830-578=252

31*1/3*41 *1/2 -11*1/3*41*1/2*2-9*1/2*41*1/3
=31/6*41-2/6*41-1/6*41
=41*(31/6-2/6-1/6)
=574/3

没连起来??