2. Fill in >,< or = to make the following true.
- a) 51_31
Step 1: Compare the denominators of the unit fractions. Since 5>3, the fraction with the smaller denominator is larger.
51<31
- b) 43_54
Step 1: Find a common denominator, which is 20.
43=2015and54=2016
Step 2: Compare the fractions.
2015<2016⟹43<54
- c) 84_21
Step 1: Simplify the fraction 84.
84=21
Step 2: Compare the fractions.
21=21⟹84=21
- d) 65_54
Step 1: Find a common denominator, which is 30.
65=3025and54=3024
Step 2: Compare the fractions.
3025>3024⟹65>54
- e) 73_32
Step 1: Find a common denominator, which is 21.
73=219and32=2114
Step 2: Compare the fractions.
219<2114⟹73<32
- f) 31_41
Step 1: Compare the denominators of the unit fractions. Since 3<4, the fraction with the smaller denominator is larger.
31>41
- g) 75_52
Step 1: Find a common denominator, which is 35.
75=3525and52=3514
Step 2: Compare the fractions.
3525>3514⟹75>52
- h) 43_64
Step 1: Simplify 64 to 32.
Step 2: Find a common denominator for 43 and 32, which is 12.
43=129and32=128
Step 3: Compare the fractions.
129>128⟹43>64
3. True or false?
- a) 32=52
Step 1: Compare the fractions. Since the denominators are different and the numerators are the same, the fractions are not equal.
False
- b) 76>54
Step 1: Find a common denominator, which is 35.
76=3530and54=3528
Step 2: Compare the fractions. 3530>3528.
True
- c) 21=84
Step 1: Simplify 84.
84=21
Step 2: Compare the fractions. 21=21.
True
- d) 61<71
Step 1: Compare the denominators of the unit fractions. Since 6<7, 61 is greater than 71.
False
- e) 54<1
Step 1: Compare the numerator and denominator. Since 4<5, the fraction is less than 1.
True
- f) 43<32
Step 1: Find a common denominator, which is 12.
43=129and32=128
Step 2: Compare the fractions. 129 is not less than 128.
False
- g) 63>74
Step 1: Simplify 63 to 21.
Step 2: Find a common denominator for 21 and 74, which is 14.
21=147and74=148
Step 3: Compare the fractions. 147 is not greater than 148.
False
- h) 31=82
Step 1: Simplify 82.
82=41
Step 2: Compare the fractions. 31 is not equal to 41.
False
4. Write these fractions in order from biggest to smallest.
Fractions: 31,51,21,81,61,41,71
Step 1: These are unit fractions. For unit fractions, the smaller the denominator, the larger the fraction.
Step 2: Order the denominators from smallest to largest: 2,3,4,5,6,7,8.
Step 3: Write the fractions in the corresponding order from biggest to smallest.
\frac{1{2}, \frac{1}{3}, \frac{1}{4}, \frac{1}{5}, \frac{1}{6}, \frac{1}{7}, \frac{1}{8}}
5. Write these fractions in order from smallest to biggest.
Fractions: 83,72,54,64,21,43,31
Step 1: Convert each fraction to a decimal for easier comparison.
83=0.375
72≈0.2857
54=0.8
64≈0.6667
21=0.5
43=0.75
31≈0.3333
Step 2: Order the decimal values from smallest to biggest.
0.2857,0.3333,0.375,0.5,0.6667,0.75,0.8
Step 3: Write the original fractions in the corresponding order from smallest to biggest.
\frac{2{7}, \frac{1}{3}, \frac{3}{8}, \frac{1}{2}, \frac{4}{6}, \frac{3}{4}, \frac{4}{5}}
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