1. Indica vecinii numerelor:
a) __________ 48599 ____________
b) 38589 _________ _____________
c) ________ __________ 635800
d) _________ 156320 ___________
2. Descopera regula si continua sirul cu inca trei numere:
a) 185905, 185909, __________ ___________ ___________
b) 39045, 40045, __________ _____________ __________
c) 896323, 896320, __________ ___________ __________
d) 10001, 12001, ___________ ___________ ___________
3. Reconstituie urmatoarele adunari:
a) 1*5*3*+
*2*1*3
___________
499989
b) 283*** +
***245
___________
599897
c) *2**5* +
**41*3
____________
889877
d) ***9*0 +
**4*3*
___________
599958
4 . Scrie A = adevarat sau F = fals, in dreptul urmatoarelor operatii:
a) 573825 – 32891 < 73858 + 62351
b) 62381 + 20 – 5 = 62381 – 5 + 20
c) 1005 + 3008 > 995 + 2009
d) 30109 – 209 > 30000 + 209
5 . Incercuieste rezultatul corect:
a) 25 + 18 x 50 = 825, 925, 2150
b) 35 x 15 + 28 x 19 = 1057, 10507, 11507
c) 453 - 216 x 4 = 828, 984, 1317
d) 893 x 0 + 825 x 1= 0, 893, 825
6. Afla cel mai mic numar format din doua cifre identice, care impartit la 5 da restul un numar impar ≥ 1.
7. Calculeaza respectand ordinea operatiilor. Asaza rezultatele in ordine descrescatoare si descopera cuvantul:
a) U [(26 + 15 x 3) – 25 : (81 : 9 – 4)] =
............................................................................................................................................................................................................................. .............................................................................................................................................................................................................................
b) B (25 + 3 x 4) + (426 : 3 + 12) =
............................................................................................................................................................................................................................. .............................................................................................................................................................................................................................
c) N 325 : 5 - (46 + 2 : 2) + 12 =
............................................................................................................................................................................................................................. .............................................................................................................................................................................................................................
8. Suma a 4 numere consecutive pare este 420. Aflati numerele.
9. Efectueaza:
a) 5 dam + 60 dm = ………………… m
b) 52 hm + 3200 cm = ……………….. m
c) 85 dam : 50 dm = ………………… m
d) 32 hm x 300 cm = ………………… m
Rezolvari
1. a) 48598 48599 48600 b)?38589 38590 38591 c)?635798 635799 635800 d)?156319 156320 156321
2. a) 185905, 185909, 185913, 185917, 185921 b)?39045, 40045, 41045, 42045, 43045 c)?896323, 896320, 896317, 896314, 896311 d)?10001, 12001, 14001, 16001, 18001
3. a) 175836 + 324153 = 499989
b) 283652 + 316245 = 599897
c) 325754 + 564123 = 889877
d) 415920+ 184038 = 599958
4 .a) 573825 – 32891 < 73858 + 62351 F
b) 62381 + 20 – 5 = 62381 – 5 + 20 A
c) 1005 + 3008 > 995 + 2009 A
d) 30109 – 209 > 30000 + 209 F
5. a) 25 + 18 x 50 = 925
b) 35 x 15 + 28 x 19= 1057
c) 893 x 0 + 825 x1 = 825
6. 11:5 = 2 REST 1
7. a) B (25 + 3 x 4) + (426 : 3 + 12) = 191
b) U [(26 + 15 x 3) – 25: (81 : 9 - 4)] = 66
c) N 325 : 5 - (46 + 2 : 2) + 12 = 30
BUN
8. 103, 104, 105, 106
9. a) 56 m = 50 m + 6 m
b) 5232 m = 5200 m +32 m
c) 170 m = 850 m : 5 m
d) 9600 m = 3200 m x 3 m
Comentarii [1 comentariu]Adauga comentariul tau
Mihaela 14 Aug. 2017 13:10:58
rãspunsul la ex nr. 8 este greșit, deoarece în exercițiu scrie nr consecutive pare, iar în rezolvare nu s-a ținut cont de aceest criteriu.Rãspunsul corect este 102, 104, 106, 108