Răspuns:
ex6
a+b+c=200000
a=215*124
b=a*3
ex7
a) x=150*670
b)x=(256*431)
b;-(100000)
c) cu cât este mai mare produsul dintre 225 și 146 decât suma lor
ex8
a.5*99
b.99*8
c.23*99
d.99*345
e.103*99
f.999*25
g.999*63
h.999*222
Explicație:
ex6
a=26660
b=26660*3
b=79980
a+b+c=200000
c=200000-(26660+79980)
c=200000-106640
c=93360
ex7
a ) x= 150*670⇒
x=100500
b) x =256*341⇒x=87296
b;=87296-100000⇒b;=-12704x este mai mic
c) y=225*146⇒x1=32850
[tex]\left \{ {{y=32850} \atop {x=371}} \right.[/tex]⇒ z=32850-371⇒z=32479
x=225+146⇒ 371
a. 5*99=5*(100-1)=5*100-5*1=500-5=495
b. 99*8=(100-1)*8=100*8-1*8=800-8=792
c. 23*99=23*(100-1)=23*100-23*1=2300-23=22977
d. 99*345=(100-1)*345=100*345-1*345=34500-345=34155
e. 103*99=103*(100-1)=103*100=103*1=10300-103=10197
f. 999*25=(1000-1)*25=1000*25-1*25=25000-25=24975
g. 999*63=(1000-1)*63=1000*63-1*63=63000-63=62937
h. 222*999=222*(1000-1)=222*1000=222*1=222000-222=221778
