Răspuns:
Explicație pas cu pas:
a) ( 48 + 63 ) : 3 = 111 : 3 = 37 → primul mod
= 48 : 3 + 63 : 3 = 16 + 31 = 37 → al doilea mod
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( 176 - 88 ) : 4 = 88 : 4 = 22 primul mod
= 176 : 4 - 88 : 4 = 44 - 22 = 22 → al doilea mod
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b) ( 2 700 + 900 - 450 ) : 90 = (3 600 - 450) : 90 = 3150 : 90 = 35
= 2 700 : 90 + 900 : 90 - 450 : 90 = 30 + 10 - 5 = 40 - 5 = 35
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(150 - 60 - 30 ) : 15 = ( 90 - 30) : 15 = 60 : 15 = 4 → primul mod
= 150 : 15 - 60 : 15 - 30 : 15 = 10 - 4 - 2 = 6 - 2 = 4 → al doilea mod
