Question

10、74% of 63
74% ≈
63 ≈
of
=

Explanation:

Step1: Convert percentage to decimal

To find a percentage of a number, we first convert the percentage to a decimal. 74% as a decimal is $0.74$.

Step2: Approximate 63

We can approximate 63 to a number that's easier to calculate with. 63 is close to 60 or 64, but 60 is a multiple of 10 which is easy. However, maybe a better approximation here is to use 63 ≈ 60 or 63 ≈ 64, but let's see. Wait, maybe the problem is to approximate 74% and 63 to make the calculation easier. Let's try approximating 74% to 75% (which is $\frac{3}{4}$) and 63 to 60 or 64. Wait, 74% is approximately 75% (0.75) and 63 is approximately 60 or 64. Let's take 63 ≈ 60 first. Then 75% of 60 is 0.75 60 = 45. But maybe 63 ≈ 64? 75% of 64 is 48. Wait, maybe the problem is to do a rough estimate. Alternatively, 74% is close to 70% and 30%, but maybe the intended approximation is 74% ≈ 75% and 63 ≈ 60. Wait, let's check the original problem again. The problem says "74% of 63" with blanks: "74% ≈ [blank], 63 ≈ [blank], [blank] of [blank] = [blank]". So we need to approximate 74% and 63, then multiply the approximations. Let's approximate 74% to 75% (which is 0.75 or $\frac{3}{4}$) and 63 to 60 (since 60 is a multiple of 10, easy to calculate with). Then 75% of 60 is $\frac{3}{4} * 60 = 45$. Alternatively, if we approximate 63 to 64, 75% of 64 is 48. But 74% is closer to 75%, and 63 is closer to 60 or 64? 63 is 3 less than 66, 3 more than 60. Maybe 60 is a better approximation for easier calculation. So let's fill in the blanks: 74% ≈ 75% (or 0.75), 63 ≈ 60, then 75% of 60 = 45. Or maybe 74% ≈ 70% and 63 ≈ 60, but 70% of 60 is 42. But 74% is closer to 75%. Let's go with 74% ≈ 75% (0.75), 63 ≈ 60, so 0.75 of 60 = 45. Alternatively, if we take 63 ≈ 64, 75% of 64 is 48. But maybe the intended answer is 74% ≈ 75%, 63 ≈ 60, so 75% of 60 = 45. Let's verify the actual calculation: 74% of 63 is 0.74 63 = 46.62, which is close to 45 or 48. 46.62 is closer to 45? No, 46.62 is closer to 47, but maybe the approximation is using 75% and 60. So the steps would be:

1. Approximate 74% to 75% (0.75).
2. Approximate 63 to 60.
3. Calculate 75% of 60: 0.75 * 60 = 45.

So the blanks would be: 74% ≈ 75%, 63 ≈ 60, 75% of 60 = 45. Or maybe 74% ≈ 70% and 63 ≈ 60, but 70% of 60 is 42, which is further from 46.62. So 75% and 60 is better.

Answer:

74% ≈ 75%, 63 ≈ 60, 75% of 60 = 45 (or other reasonable approximations, but this is a common rough estimate)