Răspuns:
Ex 35
Avem a=64+(100-9x9-5x2)
=64+(100-81-10)=
=64+(19-10)
=64+9=
=73 deci a=73.
Avem b=37+(45-6x6:6)
=37+(45-36:6)=
=37+(45-6)=
=37+39=76
Avem c=23+(27:9-24:8)
=23+(3-3)=23+0=23
2a+3b-4c=?
a este egal cu 73 deci 2a=2x73= 146
b=76 deci 3b=3x76= 228
c=23 deci 4c=23x4=92
Si calculam 2a+3b-4c=
146+228+92=466.
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