oblicz sprytnie;
DAJE NAJ
a) 56+86+49=
285+491+15=
19+63+31=
b)
689*2*5=
5*47*2=
2*283*5*10
c)
436*4*25=
25*738*4=
5*69*5*4=
49*15=
51*12=
35*14
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a) 56+86+49=191
285+491+15=791
19+63+31=123
b)
689*2*5=6890
5*47*2=470
2*283*5*10=28300
c)
436*4*25=43600
25*738*4=73800
5*69*5*4=6900
49*15=735
51*12=612
35*14=490
a)
= 191
= 788
= 113
b)
= 6890
= 470
= 28300
c)
= 43600
= 73800
= 6900
= 735
= 612
= 490