OCR Document

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, 70, . , , - . . , 5 + 5 + 5 + 5 = 20 5 (5, 10, 15, 20). 2, 5 10, . . 2, 5 10, . , . 2, 5, 10 (.. 3 5 ;), , , .. (.. . ;). , 70 (.. 30 + 30, 60 - 20, 45 + 20, 67 - 30), 70 . . , , . : ; ;. , ( 8, ..) . . . , . , , .., , ..

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