분수의 합과 차 어림하기

Daniel Math Academy · Grade 5 Math

Estimate Sums & Differences of Fractions

Skill H.1 · Adding & subtracting fractions · ★★☆ Medium · Quarter 3

Name

 

Date

 

Score/ 12

Scan for answers

Round each fraction to $0$, $\frac{1}{2}$, or $1$. Then estimate.

1. 1
   $\frac{9}{10}-\frac{3}{10}\approx$ 
2. 2
   $\frac{5}{6}-\frac{2}{3}\approx$ 
3. 3
   $\frac{4}{5}-\frac{1}{6}\approx$ 
4. 4
   $\frac{1}{3}-\frac{1}{12}\approx$ 
5. 5
   $\frac{11}{12}-\frac{1}{3}\approx$ 
6. 6
   $\frac{1}{3}-\frac{1}{10}\approx$ 
7. 7
   $\frac{4}{5}-\frac{1}{5}\approx$ 
8. 8
   $\frac{4}{5}-\frac{1}{8}\approx$ 
9. 9
   $\frac{1}{3}-\frac{1}{5}\approx$ 
10. 10
    $\frac{2}{3}-\frac{1}{6}\approx$ 
11. 11
    $\frac{2}{3}-\frac{1}{12}\approx$ 
12. 12
    $\frac{7}{8}-\frac{1}{10}\approx$ 

Daniel Math Academy · Grade 5 Math

Answer Key

H.1 Estimate Sums & Differences of Fractions · ★★☆ Medium

1. 1$1-\frac{1}{2}=\frac{1}{2}$
2. 2$1-\frac{1}{2}=\frac{1}{2}$
3. 3$1-0=1$
4. 4$\frac{1}{2}-0=\frac{1}{2}$
5. 5$1-\frac{1}{2}=\frac{1}{2}$
6. 6$\frac{1}{2}-0=\frac{1}{2}$
7. 7$1-0=1$
8. 8$1-0=1$
9. 9$\frac{1}{2}-0=\frac{1}{2}$
10. 10$\frac{1}{2}-0=\frac{1}{2}$
11. 11$\frac{1}{2}-0=\frac{1}{2}$
12. 12$1-0=1$