Operații cu numere reale

Operații cu numere reale

9th Grade

10 Qs

quiz-placeholder

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Operații cu numere reale

Operații cu numere reale

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

Diana Stanciu

Used 30+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Rezultatul calculului

 2(64)24 2\cdot\left(\sqrt{6}-4\right)-\sqrt{24}\   este egal cu

 8-8  

 4-4  

 44  

 26+42\sqrt{6}+4  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Dintre următoarele seturi de numere, cel care conține numai numere raționale este:

0; 12; 6; 20;\ -12;\ 6;\ \sqrt{2}

5;7; 9; 11\sqrt{5};\sqrt{7};\ \sqrt{9};\ \sqrt{11}

1; 2,(3); 100; 561;\ 2,\left(3\right);\ -\sqrt{100};\ \frac{\text{5}}{\text{6}}

0; 10; 1000; 100\sqrt{0};\ -10;\ \sqrt{1000};\ 100

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Prețul unei cărți este de 25 de lei. După o reducere de 40%, prețul cărții va fi:

35 lei

15 lei

26 lei

10 lei

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Numărul de elemente ale mulțimii 

 A={xZ I2x<5}A=\left\{x\in Z\ I-2\le x<5\right\}  este:

6

4

8

7

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Rezultatul calculului

 627:(33)+249-6\sqrt{27}:\left(3\sqrt{3}\right)+2\sqrt{49}  este:

 20-20  

 88  

 9292  

 8-8  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Din cei 28 de elevi ai unei clase, un sfert sunt fete. Numărul băieților din clasă este

4

7

21

20

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Scrierea ca fracție zecimală a rezultatului calculului

 12+131\frac{1}{2}+\frac{1}{3}-1  este:

 0,16-0,16  

 16-\frac{1}{6}  

 16\frac{1}{6}  

 0,1(6)-0,1\left(6\right)  

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