а=4,1382 b=9,374

а=4,1 b=9,4

a+b=4,1+9,4=13,5

a-b=4,1-9,4=-5,3

____________________

а) a=74.05 b=-9.98

a=? b=?

a+b=??

a-b=?????

б) a=3.641 b=-2.51

a=???? b=???

a+b=???

a-b=???

 

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