60/12 = 5
48/12 = 4
The answer will be between 4 and 5, closer to 5. Estimate 4.75
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Estimate: 12 -5 = 7 Actual: 12.35 -4.785 = 7.565
The front end estimate is 100. But estimating a single number, in isolation and without context, is a complete waste of time. If I had to add 130 to 1 trillion, I would estimate it as 0. If I had to add 130 to 0.0000000001, I would use the number as given - not use an estimate. Also, if I had to divide it by 25, I would estimate it as 125 since 125/25 = 5, whereas if I had to divide it by 12 I would estimate it as 132 because 132/12 = 11.
Divide by 12 (12 months in a year). For weekly, divide by 52.
It does not make sense to simply round a number without context or where there is no indication as to how much rounding is required. For example,if I needed to add 12064 to 1 trillion, I would round it to 0.if I needed to add it to 0.000023 then I'd leave it as it is.If I needed to divide it by 11 I'd choose 12100 since 12100/11 = 1100.If I needed to divide it by 12 I'd go for 12060 since 12060=12 = 1005.
35.7=36 11.4=12 36 divided by 12 = 3 The answer is 3.