Thomas R. answered • 05/28/18
Tutor
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Over 25 years of experience and a sense of humor about math
Ritz has already provided answers, but I want you to be ready for this on a test, so here is a trick I came up with years ago. Ready?
Hold out your hands (palm up or down makes no difference). Counting from your left hand, your fingers represent:
left hand: 0, 1, 2, 3, 4
right hand: 5, 6, 7, 8, 9
In the first question, you are rounding to the nearest whole number, which really means "ones". Look at the 4 in the ones place. It will look to its right and see a "2". That's on your left hand, so you round down and stay 4.
The second question, for tens place: you look at the 2 in the tens place. It wants to round, and it looks to its right where it sees 8. That's your right hand, so round your 2 up to 3.
see? Left hand means round down, right hand means round up!