Предмет: Математика, автор: Sem5000

ПОМОГИТЕ! СРОЧНО!
Раскройте скобки и найдите значение выражений:
а) 4,5 + (11 + 6,2)=
б) 3,3 + (2,5 - 4 ) =
в) 9 2/3 - ( 5 2/3 - 3 1/4) =
г) 7 3/4 - ( 4,5 - 3 1/4) =
P.s нужно сделать прям как в задании!

Ответы

Автор ответа: Батыр2004
0
а)21,7
б)1,8
в)7 1/4
г)6 1/2
Автор ответа: Sem5000
0
благодарю вас
Автор ответа: Zelnicova
0
А) 15,5+6,2=21,7 Б) 3,3-1,5=1,8 В)9 2/3-(5 2/3-3 1/4)=9 2/3- 5 2/3+3 1/4= 4+ 3 1/4= 7 1/4 Г) 7 3/4-(4,5-3 1/4)= 7 3/4- 4 5/10+3 1/4=7 2/4- 4 5/10=7 15/20-4 10/20= 3 5/20= 3 1/4
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