Question

Calculati folosind factorul comun:1)9,001×0,7+9,001+9,001×998,3= 2)0,73×1,08-0,73×0,08+0,73×9= 3)8,5×27,95-8,5×8,95+8,5= 4)53 supra100+67 supra 1000-530 supra1000+370 supra100= ​

Answer 1

1) 9,001×0,7 + 9,001 + 9,001×998,3 =

= 9,001·(0,7 + 1 + 998,3)

= 9,001·1000

= 9001

2) 0,73×1,08 - 0,73×0,08 + 0,73×9 =

= 0,73·(1,08 - 0,08 + 9)

= 0,73·10

= 7,3

3) 8,5×27,95 - 8,5×8,95 + 8,5 =

= 8,5·(27,95 - 8,95 + 1)

= 8,5·20

= 170

4) 53/100 + 67/1000 - 530/1000 + 370/100 =

= 0,53 + 0,067 - 0,53 + 3,7

= 0,067 + 3,7

= 3,767

Answer 2

Raspuns:

1)9,001×0,7+9,001+9,001×998,3 ; 9,001(0,7+1+998,3) ; 9,001×1000 ; 9001 ; 2)0,73×1,08-0,73×0,08+0,73×9 ; 0,73(1,08-0,08+9) 0,73×10 ; 7,3 ; 3)8,5×27,95-8,5×8,95+8,5 ; 8,5(27,95-8,95+1) ; 8,5×20 ; 170 ; 4)53/100+67/1000-530/1000+370/100 ; 53/100+67/1000-53/100+37/10 ; 67/1000+37/10 ; (67+37)/1000 ; 3767/1000 sau ; scris ca fractie zecimala ; 3,767

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