Answer:
1⅞ - 1½ ≈ ½
Step-by-step explanation:
Estimation is mental arithmetic. Practice until you can do this in your head.
Here's one way to estimate with mxed numbers.
Step 1. Separate into whole number and fractional parts
1⅞ - 1½ = 1 + ⅞ - 1 - ½
Step 2. Solve the whole number parts
1 - 1 = 0
Step 3. Solve the fraction parts by estimating.
We will round to the nearest ½, so we should round up a number greater than ¾.
(a) ⅞ is greater than ⁶/₈ (¾), so we round it up to ⁸/₈:
⅞ - ½ ≈ ⁸/₈ - ½
(b) Convert each fraction to a common denominator.
We can write ⁸/₈ as ²/₂
⁸/₈ - ½ = ²/₂ - ½
(c) Solve the fraction part
²/₂ - ½ = ½
Step 4. Combine the whole and fraction parts
0 + ½ = ½
So, 1⅞ - 1½ ≈ ½
