Let's go through each problem step by step:
Q1. Estimate the sum of: 4 , 768 + 3 , 945
To estimate the sum, we can round each number to the nearest thousand:
4 , 768 rounds to 5 , 000
3 , 945 rounds to 4 , 000
Now, add the rounded numbers: 5 , 000 + 4 , 000 = 9 , 000
So, the estimated sum is 9,000 .
Q2. Estimate the difference of: 8 , 213 − 3 , 786
To estimate the difference, round each number to the nearest thousand:
8 , 213 rounds to 8 , 000
3 , 786 rounds to 4 , 000
Now, subtract the rounded numbers: 8 , 000 − 4 , 000 = 4 , 000
So, the estimated difference is 4,000 .
Q3. Estimate the product of: 386 × 241
To estimate the product, round each number to the nearest hundred:
386 rounds to 400
241 rounds to 200
Now, multiply the rounded numbers: 400 × 200 = 80 , 000
So, the estimated product is 80,000 .
Q4. Estimate the quotient of: 5 , 342 ÷ 76
To estimate the quotient, round the dividend and divisor:
5 , 342 rounds to 5 , 000
76 rounds to 80
Now, divide the rounded numbers: 5 , 000 ÷ 80 ≈ 62.5
So, the estimated quotient is 63 (rounded to the nearest whole number).