Question

Найдите значение выражения -5,7 - c, если:
1) c = -4,3
2) c = 3,8
3) c = 5 1/6
4) c = -3 2/35

Answer 1

Ответ:

1) –1,4

1) –1,42) –9,5

1) –1,42) –9,53) –10 13/15

1) –1,42) –9,53) –10 13/154) –2 9/14

Пошаговое объяснение:

–5,7–с

1) с= –4,3

–5,7–с= –5,7–(–4,3)= –5,7+4,3= –1,4

2) с=3,8

–5,7–с= –5,7–3,8= –9,5

3) с=5 1/6

–5,7–5 1/6= –5 7/10–5 1/6=

= –5цел. (7•3)/(10•3)–5 цел (1•5)/(6•5)=

= –5 21/30–5 5/30= –10 26/30=

= –10 цел. (26÷2)/(30÷2)= –10 13/15

4) с= –3 2/35

–5,7–с= –5 7/10–(–3 2/35)= –5 7/10+3 2/35=

= –5цел (7•7)/(10•7)+3цел (2•2)/(35•2)=

= –5 49/70+3 4/70= –2 45/70=

= –2цел (45÷5)/(70÷5)= –2 9/14