Calculeaza:
c) 200+30×[9×(8+4):4]-880:10=
d) 16×[40+2×(560:8-7×7)]×(10-100:10=
e) 1000+8×[(56:7+12)×101-2000]:2=
f) 999:9×2+[92+2×4×(29-14×2:7)×9]+5×20=
g) 592+8×[(56:7+13)×101-2076]:2=
h) 125:5+[7×36:2-5×(5×4-36:3)]×10=
i) 125:5+[14×18:2-5×(100:5-72:6)]=
j) (100-7×2×5)×[(282:3-2):2]=
k) 25×4+[(2×13+54×2×24):2-309]:5=
Răspunsuri la întrebare
Răspuns:
Explicație pas cu pas:
c) 200 + 30 × [ 9 × ( 8 + 4 ) : 4 ] - 880 : 10 = 922
= 200 + 30 × ( 9 × 12 : 4 ) - 88 =
= 200 + 30 × 27 - 88 =
= 200 + 810 - 88 =
= 1 010 - 88 =
= 922
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d)
16 × [ 40 + 2 × (560 : 8 - 7 × 7 ) ] × ( 10 - 100 : 10 =
= 16 × [ 40 + 2 × ( 70 - 49 ) ] × ( 10 - 10 ) =
= 16 × ( 40 + 2 × 21 ) × 0 = → daca un factor este 0 produsul este 0
= 0
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e)
1 000 + 8 × [ ( 56 : 7 + 12 ) × 101 - 2 000 ] : 2 =
= 1 000 + 8 × [ ( 8 + 12 ) × 101 - 2 000 ] : 2 =
= 1 000 + 8 × ( 20 × 101 - 2 000 ) : 2 =
= 1 000 + 8 × ( 2 020 - 2 000 ) : 2 =
= 1 000 + 8 × 20 : 2 =
= 1 000 + 80 =
= 1 080
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f)
999 : 9 × 2 + [ 92 + 2 × 4 × ( 29 - 14 × 2 : 7 ) × 9 ] + 5 × 20 = 2 214
= 111 × 2 + [ 92 + 8 × ( 29 - 4 ) × 9 ] + 100 =
= 222 + ( 92 + 8 × 25 × 9 ) + 100 =
= 222 + ( 92 + 1 800 ) + 100 =
= 222 + 1 892 + 100 =
= 2 214
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g)
592 + 8 × [ ( 56 : 7 + 13 ) × 101 - 2 076 ] : 2 =
= 592 + 8 × [ ( 8 + 13 ) × 101 - 2 076 ] : 2 =
= 592 + 8 × ( 21 × 101 - 2 076 ) : 2 =
= 592 + 8 × ( 2121 - 2 076 ) : 2 =
= 592 + 8 × 45 : 2 =
= 592 + 180 =
= 772
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h)
125 : 5 + [ 7 × 36 : 2 - 5 × ( 5 × 4 - 36 : 3 ) ] × 10 =
= 25 + [ 126 - 5 × ( 20 - 12 ) ] × 10 =
= 25 + ( 126 - 5 × 8 ) × 10 =
= 25 + 86 × 10 =
= 885
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i)
125 : 5 + [ 14 × 18 : 2 - 5 × ( 100 : 5 - 72 : 6 ) ] =
= 25 + [ 126 - 5 × ( 20 - 12 ) ] =
= 25 + ( 126 - 5 × 8 ) =
= 25 + ( 126 - 40 ) =
= 25 + 86 =
= 111
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j)
( 100 - 7 × 2 × 5 ) × [ ( 282 : 3 - 2 ) : 2 ] =
= ( 100 - 70 ) × [ ( 94 - 2 ) : 2 ] =
= 30 × ( 92 : 2 ) =
= 30 × 46 =
= 1380
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k)
25 × 4 + [ ( 2 × 13 + 54 × 2 × 24 ) : 2 - 309 ] : 5 =
= 100 + [ ( 26 + 2 592 ) : 2 - 309 ] : 5 =
= 100 + ( 2 618 : 2 - 309 ) : 5 =
= 100 + ( 1 309 - 309 ) : 5 =
= 100 + 1 000 : 5 =
= 100 + 200 =
= 300