Sengoloa Mabapi le Melao ea Bohlokoa ea Lipalo
Lipalo tsa bohlokoa ke lipalo tse fumanoang ka litekanyo tse nang le lipalo tse tobileng tsa bohlokoa (tse baloang sesebelisoa sa ho lekanya) le palo e le 'ngoe ea ho qetela e hakantsoeng.
A re re re lekanya bolelele ba ntho re sebelisa rula (Moeli oa ho nepahala ha rula ke 1 mm kapa 0,1 cm) 'me re tlaleha sephetho ka lipalo tse 3 tsa bohlokoa, mohlala 4,55 cm. Haeba bolelele ba ntho bo lekanngoa ho sebelisoa caliper ea vernier (Moeli oa ho nepahala ha caliper ea vernier ke 0,1 mm kapa 0,01 cm) 'me sephetho se tlalehoa ka lipalo tse 4 tsa bohlokoa, mohlala 4,485 cm 'me haeba se lekanngoa ka gauge ea sekurufu ea micrometer (Moeli oa ho nepahala ha gauge ea sekurufu ea micrometer ke 0,01 mm kapa 0,001 cm) 'me sephetho se tlalehoa ka lipalo tse 5 tsa bohlokoa, mohlala 3,4845 cm. Sena se bontša hore palo ea lipalo tsa bohlokoa tse tlalehiloeng e le sephetho sa tekanyo e bontša ho nepahala ha tekanyo. Ha lipalo tsa bohlokoa tse ka tlalehoang, tekanyo e nepahetse haholoanyane. Ehlile, ho lekanya bolelele ba ntho ka gauge ea sekurufu ea micrometer ho nepahetse ho feta ka caliper le rula ea vernier.
Sephetho sa tekanyo se sebedisang rula se hlahiswa ka palo e nang le dipalo tse 2 tsa bohlokwa: 4,55 cm. Dipalo tse pedi tsa pele, e leng: 4 le 5 ke dipalo tse nepahetseng hobane di ka balwa sekaleng, ha palo ya ho qetela, e leng 5, e le palo e hakanyetswang hobane palo ena e ke ke ya balwa sekaleng, empa e ka hakanyetswa feela.
- Linomoro tsohle tse seng tsa lefela ke lipalo tsa bohlokoa.
- Lefela pakeng tsa dinomoro tse pedi tse seng lefela ke nomoro ya bohlokwa. Mohlala: 1208 e na le lipalo tse 'ne tsa bohlokoa. 2,0067 e na le lipalo tse hlano tsa bohlokoa.
- Linoto life kapa life tse sebelisoang feela e le libaka tsa desimali ha se lipalo tsa bohlokoa. Mohlala: 0,0024 e na le lipalo tse peli tsa bohlokoa, e leng 2 le 4
- Linoto tsohle tse fumanehang moleng oa ho qetela oa linomoro tse ngotsoeng ka mor'a ntlha ea desimali ke lipalo tsa bohlokoa. Mohlala oa 1 : 0,003200 e na le lipalo tse 'ne tsa bohlokoa, e leng 3, 2 le li-zero tse peli ka mor'a nomoro ea 32. Mohlala oa 2 : 0,005070 e na le lipalo tse 'ne tsa bohlokoa, e leng 5,0,7,0Mohlala oa 3 : 20,0 e na le lipalo tse peli tsa bohlokoa, e leng 2 le 0
- Linomoro tsohle tse ka pele ho ordinal (ho ea ka lintlha tsa saense) ke lipalo tsa bohlokoa. Mohlala: 3,2 x 105 e na le lipalo tse peli tsa bohlokoa, e leng 3 le 2. 4,50 x 103 e na le lipalo tse tharo tsa bohlokoa, e leng 4, 5 le 0
Melao ea ho atisa le ho arola lipalo tsa bohlokoa
Sephetho sa katiso kapa karohano se lokela ho ba le dinomoro tse ngata jwalo ka palo e nang le palo e nyane ka ho fetisisa ya dipalo tse bohlokwa tse sebedisitsweng katisong kapa karohanong…
Mehlala ea Katiso ea Lipalo tsa Bohlokoa
Mohlala oa 1: 3,4 x 6,7 = … ?
Palo e fokolang ka ho fetisisa ea lipalo tsa bohlokoa ke tse peli (3,4 le 6,7 li na le lipalo tse peli tsa bohlokoa). Sephetho ke 22,78. Sephetho sena se tlameha ho sekamisoa ho 23 (lipalo tse peli tsa bohlokoa). 3,4 x 6,7 = 23
Mohlala oa 2: 2,5 x 3,2 = … ?
Palo e nyenyane ka ho fetisisa ea lipalo tsa bohlokoa ke tse peli (2,5 le 3,2 li na le lipalo tse peli tsa bohlokoa). Haeba re bala re sebelisa khalkhuleita, sephetho ke 8. Re tlameha ho eketsa lefela. 2,5 x 3,2 = 8,0 (lipalo tse peli tsa bohlokoa)
Mohlala oa 3: 1,0 x 2,0 = 2,0 (lipalo tse peli tsa bohlokoa), eseng 2
Mohlala oa karohano ea bohlokoa ea libopeho:
Mohlala oa 1: 2,0 : 3,0 = …. ?
Palo e nyenyane ka ho fetisisa ea lipalo tse bohlokoa ke tse peli. Haeba u sebelisa khalkhuleita, sephetho ke 0,666666… e lokelang ho sekamisoa ho lipalo tse peli feela tsa bohlokoa: 2,0 : 3,0 = 0.67 ( lipalo tse peli tsa bohlokoa, e leng 6 le 7).
Mohlala oa 2: 2,1 : 3,0 = …. ?
Palo e nyenyane ka ho fetisisa ea lipalo tse bohlokoa ke tse peli. Haeba u sebelisa khalkhuleita, sephetho ke 0,7. Ho tlameha ho eketsoa lefela ho netefatsa hore ho na le lipalo tse peli tse bohlokoa. 2,1 : 3,0 = 0.70 ( lipalo tse peli tse bohlokoa: 7 le 0).
Melao ea ho Eketsa le ho Tlosa Lipalo tsa Bohlokoa
Ho phaella kapa ho tlosa, sephetho ha sea lokela ho nepahala ho feta palo e sa nepahalang haholo.
Mohlala oa 1: 3,7 – 0,57 = …?
3,7 ke yona e nepahetseng ka ho fetisisa. Haeba o sebedisa khalkhuleita, sephetho ke 3,13. Sephetho sena se nepahetse ho feta 3,7, kahoo se lokela ho sekasekwa ho 3,1. 3,7 – 0,57 = 3,1
Mohlala oa 2: 10,24 + 32,451 = …… ?
10,24 ke eona e nepahetseng ka ho fetisisa. Haeba u sebelisa khalkhuleita, sephetho ke 42,691. Sephetho sena se nepahetse ho feta 10,24, kahoo se lokela ho sekasekwa ho 42,69. 10,24 + 32,451 = 42,69
Mohlala oa 3: 10,24 + 32,457 + 2,6 = …. ?
2,6 ke yona e nepahetseng ka ho fetisisa. Ho di kopanya ho hlahisa 45,297. Sephetho sena se nepahetse ho feta 2,6, kahoo se lokela ho sekamiswa ho 45,3. 10,24 + 32,457 + 2,6 = 45,3
Palo ea lipalo tsa bohlokoa sephethong sa ho eketsa kapa ho ntša ha e na taba.
Mohlala oa mathata
1. Liphetho tsa ho lekanya bolelele le bophara ba sebaka sa naha se khutlonnetsepa ke 12,23 m le 14,3 m. Sebaka sa naha ho latela melao ea lipalo tse bohlokoa ke…..
A. 175,8890 m2
B. 175,889 m2
C. 175,89 m2
D. 175,8 m2
E. 175 m2
Puisano
Sebaka = 12,23 x 14,3 = 174,889 m2
Molao oa lipalo tse bohlokoa ka ho atisa: palo ea lipalo tse bohlokoa sephethong e lokela ho lekana le lipalo tse fokolang ka ho fetisisa tsa bohlokoa linomorong tse atisitsoeng. 12,23 e na le lipalo tse 4 tsa bohlokoa, 'me 14,3 e na le lipalo tse 3 tsa bohlokoa. Lipalo tse fokolang ka ho fetisisa tsa bohlokoa ke 3, kahoo sephetho se tlameha ho ba le lipalo tse 3 tsa bohlokoa.
174,889 e na le lipalo tse 6 tsa bohlokoa, kahoo e tlameha ho baloa ho lipalo tse 3 tsa bohlokoa feela = 175.
Karabo e nepahetseng ke E.
2. Ha o lekanya bolelele ba ntho, sephetho sa tekanyo ke limithara tse 0,08020. Palo ea lipalo tsa bohlokoa Liphetho tsa tekanyo ke…
A. e le 'ngoe
B. tse peli
C. tse tharo
D. bone
E. hlano
Puisano
Ho ya ka melao ya dipalo tse bohlokwa, palo ya dipalo tse bohlokwa ho 0,08020 ke tse nne (0,08020)
