Question

Scrieti trei fractii zecimale: a) cuprinse intre 7,21 si 7,23 b) cuprinse intre 6,19 si 6,2 c) cuprinse intre 8,342 si 8,343 d)cuprinse intre 7,003 si 7,28

Answer 1

Răspuns:

Explicație pas cu pas:

• trei fractii zecimale: a) cuprinse intre 7,21 si 7,23

7,21 = 7,210

7,23 = 7,230

210< 211<212<213<214<...<230⇒ 7,210<7,211<7,212<7,213<...<7,230 dar stim ca 7,210=7,21 si 7,23=7,230⇒7,21<7,211<7,212<7,213<...<7,23

• trei fractii zecimale: b) cuprinse intre 6,19 si 6,2

6,19=6,190

6,2=6,200

190<191<192<193<194<...<200⇒6,190<6,191<6,192<6,193<...<6,200, dar stim ca 6,190=6,19 si 6,200=6,2⇒6,19<6,191<6,192<6,193<...<6,2

• trei fractii zecimale: a c) cuprinse intre 8,342 si 8,343

8,342=8,3420

8.343=8.3430

3420<3421<3422<3423<3424<3425<3426<3427<3428<3429<3430⇒ 8,3420<8,3421<8,3422<8,3423<8,3424<8,3425<8,3426<8,3427<8,3428<8,3429<8,3430  , dar cum 8,3420=8,342 si 8,3430=8,343 ⇒8,342<8,3421<8,3422<8,3423<8,3424<8,3425<8,3426<8,3427<8,3428<8,3429<8,343

• trei fractii zecimale: cd)cuprinse intre 7,003 si 7,28

7,003=7,003

7,28=7,280

3<4<5<...<277<278<279<280 ⇒ 7,003<7,004<....<7,278<7,279<7,280 si cum 7,280=7,28⇒7,003<7,004<....<7,278<7,279<7,28