710037|9....................................................
63.........78893............................................
----..............................................................
..80.............................................................
..72.............................................................
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....80...........................................................
....72...........................................................
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......83.........................................................
......81.........................................................
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.........27......................................................
.........27......................................................
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............0.....................................................
Ответ:
Р= 12*2+8*2=24+16=40 (см)
(формула Р=а+b+a+b или P=2*a+2*b)
S=12*8=96 см
(формула S=a*b)
1)17-8=9
2)72÷9=8
3)8+5=13
ответ 13