Проверка домашнего задания

значение выражения:
№ 236 – 238(б)
– 98,4 – 52,06 + 25,2

= – 150,46 + 50,46 =

– 100

43,52 + 47,3 – 60,8 – 100,05 =

= 90,82 – 160,85 =

– 70,03

– 31,6 + 11,08 – 31,04 + 62,64 =

11,08

– 9 =
(+у) + (– 9)
б) – 4

(–4) + (–b) + (+а)

в) – с – 8 – d =

(–с) + (– 8) + (–d)

г) – m – n – k =

(–m) + (– n) + (–k)

скобками и без скобок.
а) – 8, – а, b
(–8)

– 8 – а + b

б) – с, – 3, – d

(– c) + (– 3) + (– d) =

– c – 3 – d

в) – 5, m, – 7, – n

(– 5) + (+m) + (– 7) + (– n) =

– 5 + m – 7 – n

а = 15, b = – 17
15 – 17

15 – 17 – 18 =

– 20

б) а = – 14, b = – 12

– 14 – 12 + (– 18) =

– 14 – 12 – 18 =

– 44

а б о т а.

=
94
k =
2 · 94 – 100 =
88
l

– 22 + 88 =

66

s =

66 + 33 =

99

t =

– 4 + 99 =

95

+ (–7)
= (–34) + (+9)
= (+57) + (–21)
= (–25)

= (–13) + (–5)

= (–29) + (+7)

= (+42) + (–16)

= (–15) + (+65)

27, –32 , –18
35, –41, –29, 25
–46, 20, –24, 70
=

= –10

= 20

42, 58, –16, –24

25, –53, –37, 45

–31, 30, –49, 60

= 60

= –20

= 10

С – 7.4