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1.1 .
1.2
2.1.1 , :
2.1.2 1 ,
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2.1.3
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2.1.4
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2.1.5
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2.2 .
2.2.1 ? _________________________________________________________
2.2.2 ? __________________________________________________
2.2.3 ? ___________________________________________________________________
2.2.4 ? _______________________________________________________
2.2.5 3 + > 6
2.2.6 23 10, 7. .
, , - .
1) (-23)× 10 = 7 2) 10× (+23) = 7
2) (+23): 1 = 7 4) 10: (+23) = 7
2.2.7 500 . . 2 , 30% .
1) 620 . . 2) 560 . . 3) 845 . . 4) 515 . .
2.2.8 10%, , , 10 %. , 26 ?
1) 25,74 2) 16 3) 26 4) 23,4
2.2.9 2 t 50 /. S ?
1) S = 2t + 50 2) S = 2 + 50t
3) S = 2 + t: 50 4) S = (t+2) ×50
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