Not in this case.
Rounding is closer because the amount added to one number is the same as the amount subtracted from the other number which makes the answer match exactly.
4.0937
I am not sure that there is a sensible answer to this question. There is no actual formation of real numbers: they are an abstract concept.
They are numbers that "work well" or are friendly with each other. In a problem like 16 + 4+8 + 12 + 5, you could say 16 + 4 is 20 and 8+ 12 is 20. 20 + 20 is 40 and with the other five you would just add it so it would be: 16+4=20 8+12=20 20+20=40 40+5=45 So they are numbers that most people would find it easy to add, subtract, or divide. 232 ÷ 11 may be hard to do in your head. We can use the compatible number 12 and 240 since that division is easy to do in your head. 12 goes into 240 20 times. The easy way to do this in your head is to note that 12 goes into 120 10 times so it goes into 240 twenty times. This gives us an estimate of the answer when we consider that both number were increased by 1. Say you wanted to multiply 288 by 415 . We note that the compatible numbers for 288 and 415 are 300 and 400 In the addition example, we group certain numbers first and that makes addition easy.
Estimate: 12 -5 = 7 Actual: 12.35 -4.785 = 7.565
rounding:9lb+63lb=about 72lb
Compatible numbers would be easier. Rounding gives you 14 x 47. Compatible numbers could be 13 x 50 which would be closer to the actual product.
9+63+863+9
The best way to estimate a quotient using compatible numbers is to first understand how compatible numbers work. They are numbers that are close in value to the actual numbers and are easily added, subtracted or divided.
the purpose of rounding numbers is that you can get closer to the actual answer
What are compatible fractions? Round the whole number to the closest compatible number to the denominator. Compatible numbers are numbers that are close in value to the real number that would make it easier to find an estimate calculation. compatible numbers are numbers that are a like or can compared like fact families! Compatible numbers When estimating, compatible numbers are numbers that are close in value to the actual numbers, and which make it easy to do mental arithmetic. In mathematics, compatible numbers are the numbers that are easy to add, subtract, multiply, or divide mentally. Compatible numbers are close in value to the actual numbers that make estimating the answer and computing problems easier. We can round the numbers to the nearest ten, hundred, thousand or ten thousand to make them compatible numbers. For instance, if we have to add 493 and 549, we can make the numbers compatible by rounding them up to the nearest tens or hundreds. 490 and 550 (rounded to the nearest tens) or 500 and 500 (rounded to the nearest hundreds) are much easier to solve. So, we know the answer is about 1040 or 1000. Let us see some examples to understand how we can perform subtraction, multiplication and division using compatible numbers. Subtraction: Find the difference between 376.5 and 612.2 Here, we cannot find the difference between 376.5 and 612.2 easily as they are not compatible. So, we make the numbers compatible by rounding both the numbers to the nearest tens. Multiplication: Find the product of 24.3 and 18.7. It is difficult to find the product of 24.3 and 18.7 mentally and quickly. So, we use compatible numbers and find the which is closer to the actual answer. Division: Divide 856 by 33. To find the answer to 856 รท 33, will take us time as we need to divide to get the answer. However, if we make the numbers compatible, we can mentally find an answer close to the actual answer as shown. Fun Facts Compatible numbers help in simplifying the calculation of an estimate only.
Rounding is closer because the amount added to one number is the same as the amount subtracted from the other number which makes the answer match exactly.
Compatible numbers are numbers that are close in value to the actual numbers and easy to add, subtract, multiply, or divide mentally.So a logical compatible number for 77 would be 80.
Rounding off, 80 x 60 = 4800. The actual product is 4698.
2 x 6300 = 12,600 The actual answer is 12,508.
Yes, it would help when rounding. I rounded 0.8 up to 1 and 412 down to 400. 1*400=400 The actual answer: 0.8*412=329.6
9 x 500 = 4500 and 9 x 600 = 5400, so you know the answer will be close to halfway between those two numbers. The actual answer is 4860.