Operações com números racionais (adição, subtração e multiplicaç

Quiz
•
Mathematics
•
7th Grade
•
Medium
Mirian Menezes
Used 2+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Represente as frações na forma decimal.
a) 12/5
b) 47/8
c) 9/4
2,4
5,875
2,25
2,5
5,785
22,5
22,5
5,785
2,4
2,3
5,875
2,25
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Leia as afirmativas e assinale a opção que as classifica corretamente em verdadeiras(V) ou falsas(F).
1 - Todo número natural, também é um número racional.
2 - Números racionais não podem ser escritos na forma de fração.
3 - Existem números que são inteiros mas, não são naturais, ainda que sejam racionais.
4 - Um número racional pode ter infinitas casas decimais.
1-F, 2-F, 3-V, 4-V.
.
1-V, 2-F, 3-V, 4-F.
1-V, 2-F, 3-V, 4-V.
1-V, 2-V, 3-V, 4-V.
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Efetue as somas e subtrações dos números racionais.
a) 4/6 + 2/6
b) 8/3 - 5/7
c) 13,45 + 0,3
a) 1
b) 41/21
c) 13,75
a) 2
b) 21/41
c) 137,5
a) 1
b) 41/21
c) 1,375
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
13/4
5/2
9/4
6/5
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
-8/10
-16/25
16/25
8/10
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sabendo que a = 0,222 + 0,333 + 0,444 e b = 0,222 + 0,333 − 0,444, o valor de b − a é
−0,0009.
− 0,888.
0,111.
0,999
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