
Expressão algébrica
Authored by Maite Salinas
Mathematics
7th Grade
CCSS covered
Used 424+ times

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16 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Indique a sentença matemática verdadeira
-5 < -9
(-3)² = -9
-7 + 8 = -1
9 . 5 = 5 . 3²
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Um prédio tem nove andares com três janelas em cada andar. Todas as janelas tem vidro fumê com comprimento de medida a e largura de medida b. Escreva a expressão algébrica que representa a área envidraçada do prédio.
12ab
27ab
-12ab
-27ab
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
O valor numérico da expressão -x² para x = +8 é
-64
-32
+64
+32
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual o valor da expressão x³ para x = -2
-6
+6
-8
+8
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
O valor de x² - y² para x = -3 e y = -2 é
+ 1
-1
+ 5
-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A adição algébrica 5a - (2a - 6a - 8a) é igual a
14a
15a
17a
21a
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Paula tem 45 anos. Qual a expressão algébrica que representa a idade que ela teve há x anos?
45x
45 + x
45 - x
não tem a expressão correta
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