maTematika 7

12. ipoveT, ra cifriT bolovdeba ricxvi:(733+29·39)·3-257 229·39 bolovdeba 1-iT.733+29·39 bolovdeba 4-iT.(733+29·39)·3 bolovdeba 2-iT.257 2 bolovdeba 9-iT.(733+29·39)·3–257 2 bolovdeba 3-iT.13. daamtkiceT, rom 56**7 ricxvi ar SeiZleba iyos romelime naturaluri ricxviskvadrati.naturaluri ricxvis kvadrati SeiZleba bolovdebodes 00-iT (ori nuliT), 1-iT, 4-iT,25-iT, 6-iT, 9-iT.14. 42*4* varskvlavebis nacvlad CasviT cifrebi, rom mocemuli ricxvi gaiyos 36-ze(ix. amocana 4a).saZiebeli ricxvebia 42840; 42444; 42048; 42948.15. ra cifriT bolovdeba 25 3 -24 2 +22 3325 = ... 53 o jamis bolo cifri iqneba 3.22 = ... 824 2 =...6, e. i. ...3 - .....6= ..... 7. bolo cifria 7.16. 10a+b=4(a+b)10a+b=4a+4b6a=3b da b=2a, e. i. miviReT, rom erTeulebis cifri orjer metia aTeulebis cifrze,SerCeviT miviRebT, rom es ricxvebia 12; 24; 36; 48.17. 1+2+3+...+108+109+110=(1+110)+(2+103)+(3+108)++... +(55+56)=55·111111 iyofa 37-ze e. i. jami iyofa 37-ze.18. daamtkiceT, rom:a) nebismieri naturaluri n ricxvisaTvis:(n+7)(n+12) 2;b) nebismieri mTeli m da n ricxvebisaTvis:mn(m+n) 2.a) Tu n luwi ricxvia n+12-c luwia, xolo Tu n kentia, maSin n+7 luwia, orive SemTxvevaSi(n+7)(n+12) luwia.b) Tu m da n ricxvebidan erT-erTi mainc luwia, mn Tanamamravli iqneba luwi, xoloTu orive kentia, m+n iqneba luwi.19. WeSmaritia b. 20. b.21. g (iyofa 7-zec)22. 153; 252 ... 450; 459; 558 ... 950; 959. sul 11 ricxvi.34masc_cigni_VII_kl_cor.indd 34 03.07.2012 15:46:28