Calcule o valor das expressões numéricas:
A)(-9)²+(+5).(+16)=
B)(-2)⁴÷(+16).(-1)⁷=
C)(-6)²-(7)²+13⁰=
D)5²-(-3)³+(-4)²=
E)4.(-5)³+(-20)²=
Soluções para a tarefa
A) 81 + 5 × 16 = 81 + 80 = 161
B) 16 ÷ 16 × (-1) = 1 × (-1) = -1
C) 36 - 49 + 1 = -13 + 1 = -12
D) 25 + 27 + 16 = 52 + 16 = 68
E) 4 × (-125) + 400 = -500 + 400 = -100
Resposta:
A)161
B)-1
C)-12
D)68
E)-100
Explicação passo-a-passo:
A)(-9)^2 +(+5). (+16)
(-9)^2 + (+5).(+16)
9^2 +5×16
9^2
9×9
81
9^2 +5×16
81+5×16
5×16
80
81+5×16
81+80
161
resposta
161
B)(-2)^4 ÷ (+16) × (-1)^7
(-2)^4 ÷ (+16) × (-1)^7
2^4 ÷ 16×(-1)^7
2^4
2×2×2×2
16
2^4 ÷ 16×(-1)^7
16÷16×(-1)^7
16^1 ÷16×(-1)^7
16^1 ÷ 16^1 ×(-1)^7
16^1 × 16^1 (-1)^7
16^1^-^1 (-1)^7
16^0 (-1)^7
(-1)^7
-1^7
-1
resposta
-1
C)(-6)^2 -(7)^2 +13^0
(-6)^2 -(7)^2 +13^0
6^2 - 7^2 + 13^0
6^2
6×6
36
6^2 + 7^2 + 13^0
36+ 7^2 +13^0
7^2
7×7
49
36- 7^2 +13^0
36-49+ 13^0
13^0
1
36-49+ 13^0
36-49+1
37-49
-12
36-49+1
-12
resposta
-12
D)5^2 -(-3)^3 + (-4)^2
5^2 -(-3)^3 + (-4)^2
5^2
5×5
25
5^2 - (-3)^3 +(-4)^2
25-(-3)^3 + (-4)^2
25-(-3)^3 +(-4)^2
25+3^3 +(-4)^2
3^3
3×3×3
27
25+3^3 +(-3)^2
25+27+(-4)^2
25+27+4^2
4^2
4×4
16
25+27+4^2
25+27+16
25+27
52
25+27+16
52+16
68
25+27+16
68
resposta
68
E)4×(-5)^3 + (-20)^2
4×(-5)^3 + (-20)^2
4×(-5^3) + (--20)^2
4×(-5)^3
-4×5^3
-5^3
5×5×5
125
-4×5^3
-4×125
4×(-5^3) + (-20)^2
-4×125+(-20)^2
-4×+125
-500
-4×125+(-20)^2
-500+(20)^2
-500+20^2
20^2
20×20
400
-500+20^2
-500+400
-100
resposta
-100