1.
1/2+1/2=
Correct Answer
C. 1
Explanation
The given equation is a simple addition of two fractions, 1/2 and 1/2. When we add these fractions, the numerators (1+1) add up to 2, and the denominator remains the same (2). Therefore, the result of 1/2 + 1/2 is 2/2, which simplifies to 1.
2.
1/2+1/4=
Correct Answer
D. 3/4
Explanation
To solve the given equation, we need to find a common denominator for the fractions 1/2 and 1/4. The common denominator for 2 and 4 is 4. Thus, we can rewrite the fractions as 2/4 and 1/4. Adding these fractions together gives us 3/4. Therefore, the correct answer is 3/4.
3.
1/2+1/8+1/4
Correct Answer
B. 7/8
Explanation
To solve this question, we need to find the sum of the given fractions. First, we need to find a common denominator, which in this case is 8. Then, we convert each fraction to have a denominator of 8. 1/2 becomes 4/8, 1/8 remains as 1/8, and 1/4 becomes 2/8. Adding these fractions together, we get 4/8 + 1/8 + 2/8 = 7/8. Therefore, the correct answer is 7/8.
4.
1/3+1/5
Correct Answer
E. 8/15
Explanation
The given expression is a sum of two fractions: 1/3 and 1/5. To add these fractions, we need to find a common denominator, which in this case is 15. We can convert 1/3 to have a denominator of 15 by multiplying the numerator and denominator by 5, resulting in 5/15. Similarly, we can convert 1/5 to have a denominator of 15 by multiplying the numerator and denominator by 3, resulting in 3/15. Adding these two fractions together gives us 5/15 + 3/15 = 8/15.
5.
4/9+7/18
Correct Answer
D. 15/18
Explanation
The given expression is a sum of two fractions. To add fractions, we need to have a common denominator. In this case, the common denominator is 18. We can rewrite 4/9 as 8/18 and 7/18 remains the same. Adding these fractions gives us 15/18. Therefore, the correct answer is 15/18.
6.
0.1+0.01+0.001+0.0001+0.00001+0.000001
Correct Answer
B. 0.111111
Explanation
The given expression is a sum of six decimal numbers. When we add these numbers, we get the result 0.111111.
7.
0.123456789+0.876543211
Correct Answer
E. 1
Explanation
The sum of 0.123456789 and 0.876543211 is equal to 1.
8.
0.1999+1.999+19.99+199.9
Correct Answer
B. 222.0889
Explanation
The given expression is a sum of four numbers: 0.1999, 1.999, 19.99, and 199.9. Adding these numbers together gives a total of 222.0889.
9.
3.25+1.79-0.59+1.75
Correct Answer
A. 6.2
Explanation
The given expression involves addition and subtraction of decimal numbers. By performing the operations, we get a result of 6.2.
10.
10000-0.999-9.99-99.9-999
Correct Answer
E. 8989.111
Explanation
The given expression is 10000-0.999-9.99-99.9-999. When we subtract 0.999 from 10000, we get 9999.001. Then, subtracting 9.99 from 9999.001 gives us 9989.011. Subtracting 99.9 from 9989.011 gives us 9889.111. Finally, subtracting 999 from 9889.111 gives us 8889.111. Therefore, the correct answer is 8989.111.
11.
Which sum is bigger 0.7x 0.8x 0.7x 0.8 or 0.6x 0.9x 0.6x 0.9
Correct Answer
B. 0.7x 0.8x 0.7x 0.8
12.
3x 0.3x 0.03x 0.003x 0.0003
Correct Answer
A. 0.0000000243
Explanation
The answer 0.0000000243 is obtained by multiplying the given sequence of numbers: 3x * 0.3x * 0.03x * 0.003x * 0.0003. Each subsequent number is obtained by multiplying the previous number by 0.1. Therefore, to find the final answer, we multiply 3x by 0.3, then multiply the result by 0.03, and so on. The final answer is the product of all these multiplications.
13.
100% of 100
Correct Answer
B. 100
Explanation
The given answer, 100, is the only option that matches the given information. The question states "100% of 100", which means that 100% of a whole is equal to 100. Therefore, the correct answer is 100.
14.
50% of 50
Correct Answer
D. 25
Explanation
To find 50% of 50, we divide 50 by 2 since 50% is equivalent to half. Therefore, 50 divided by 2 equals 25.
15.
2/5x1/2+40%+0.4
Correct Answer
D. 1
Explanation
The given expression involves multiplication, addition, and percentage calculations. To solve it, we first multiply 2/5 by 1/2, which gives us 1/5. Then we add 40% to this result, which is equivalent to adding 0.4. Finally, we add 0.4 to the previous result of 1/5. After simplifying all the calculations, we get the answer as 1.