1. estimate the sum
11/15+1/8
2 .use rounding to estimate the product
4 3/4 * 7 2/17
3. choose the sum
5/6 + 4/9
A. 1/2
B. 9/18
C. 1 5/18
D. 1 1/2
please I need help
The Awnser is c
1. To estimate the sum of 11/15 + 1/8, we can first find a common denominator for these fractions. The least common multiple (LCM) of 15 and 8 is 120. So, we can rewrite the fractions as:
11/15 = (11/15) * (8/8) = 88/120
1/8 = (1/8) * (15/15) = 15/120
Now, we can add the fractions:
11/15 + 1/8 = 88/120 + 15/120 = (88 + 15)/120 = 103/120
To estimate this sum, we can round the fractions to the nearest whole number or a simpler fraction.
Rounded to the nearest whole number, 103/120 would be about 1.
Rounded to the simpler fraction, 103/120 can be simplified to 5/6. So, the estimated sum is 5/6.
2. To estimate the product of 4 3/4 * 7 2/17 using rounding, we can round the mixed numbers to the nearest whole number or the nearest fraction.
4 3/4 can be rounded to 5, and 7 2/17 can be rounded to 7.
5 * 7 = 35
So, the estimated product is 35.
3. To choose the sum between 5/6 + 4/9, we can find a common denominator for these fractions. The least common multiple (LCM) of 6 and 9 is 18.
5/6 = (5/6) * (3/3) = 15/18
4/9 = (4/9) * (2/2) = 8/18
Now, we can add the fractions:
15/18 + 8/18 = 23/18
To choose the sum, we need to simplify the fraction.
23/18 can be simplified to a mixed number: 1 5/18.
So, the sum of 5/6 + 4/9 is C. 1 5/18.