Смотри,.....................
.
Ответ:
#20 а) 7
#20 б) 10
#21 а) 1
#21 б) 2
Пошаговое объяснение:
#20: а) 5 + 2 = + 2 = = = 7
#20 б) 7+3 = 7 + = = =
#21 а) 2-
#21 б)
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Answers & Comments
Смотри,.....................
.
Ответ:
#20 а) 7
#20 б) 10
#21 а) 1
#21 б) 2
Пошаговое объяснение:
#20: а) 5
+ 2 =
+ 2 =
=
= 7
#20 б) 7+3
= 7 +
=
=
= 
#21 а) 2-
#21 б)