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RebeccaLOLnr1
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va rog ajutatima! e urgent!?

ex 25: din inseptitul fiecaruia dintre numerele: 222, 323, 287, 266 scade cel mai mare numar consecutive pare.

ex 26: Marcel a consumat 79 dinpatroanele pentru stilou, ceea ce reprezinta a noua parte din numarul total al patroanelor pe care le are el. Cate patroane a avut in total Marcel?

ex 27: afla dublul numerelor de 8 ori mai mari de cat: 56; 98; 36, 92, 45, 72, 68, 49, 29, 81, 59, 38, 77, 88, 99.

ex 28: afla necunoscutele ( atentie la ordinea efectuari operatiilor!)
184×3+200-o=493
40:8+124×5+m=719
(104×4+83×5)-s×3=8×100+36÷9
(321×2-115×4)+42:v=180+2×4
(138×5-21:7-300×2) -9×9-n×2=2
692+248-[800-(123×2+88×3)]-b×8=300×2+2

DAU COROANA!!!!
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Răspuns :

ex.27
afli nr de 8 ori mai mari decat nr date, adica fiecare nr il inmultesti cu 8 si apoi dublul nr obtinut, adica nr ori 2.
56*8=448
448*2=896
98*8=784
784*2=1568
36*8=288
288*2=576
92*8=736
736*2=1472
45*8=360
360*2=720
72*8=576
576*2=1152
68*8=544
544*2=1088
49*8=392
392*2=784
29*8=232
232*2=464
81*8=648
648*2=1296
59*8=472
472*2=944
38*8=304
304*2=608
77*8=616
616*2=1232
88*8=704
704*2=1408
99*8=792
792*2=1584

ex28
184*3+200-o=490
552+200-o=490
752-o=490
o=752-490
o=262

40:8+124*5+m=719
5+620+m=719
625+m=719
m=719-625
m=94


(104*4+83*5)-s*3=8*100+36:9
(416+415)-3s=800+4
831-3s=804
3s=831-804
3s=27
s=27:3
s=9

(321*2-115*4)+42:v=180+2*4
(642-460)+42:v=180+8
182+42:v=188
42:v=188-182
42:v=6
v=42:6
v=7

(138*5-21:7-300*2)-9*9-n*2=2
(690-3-600)-81-2n=2
87-81-2n=2
6-2n=2
2n=6-2
2n=4
n=4:2
n=2

692+248-[800-(123*2+88*3)]-b*8=300*2+2
940-[800-(246+264)]-8b=600+2
940-(800-510)-8b=602
940-290-8b=602
650-8b=602
8b=650-602
8b=48
b=48:8
b=6