Question

1. Lily moves 0.337 tonnes of sand to make a sandpit how much is this to two decimal places? 2. Lily moves 0.5 tonnes of pebbles to decorate the flower bed. If this mass has been to one decimal place, which of these could be the actual mass of pebbles? A 0.351 tonnes B. 0.562 tones C 0.545 tonnes D 0.445 tonnes. 3. Using your answer from questions 14, round the actual mass of pebbles to two decimal places. /4

Answer 1

if <5, then 0
if 5 or more, then 10

.34

2.
.351 ---> .4
.562 ---> .6
.545 ---> .5 whew
.445 ---> .4

3.
.351 --> .35
.562 --> .56
.545 --> .55 *****
.445 --> .45

Answer 2

#1 0.34
#2 C
0.351 -> 0.4
0.562 -> 0.6
0.445 -> 0,4

#3 0.545 -> 0.55
Most people round up from 5.
Some round to the closest even value, which would be 0.54 in this case. Follow the rules you were given.

Answer 3

Here is the rationale I gave for an earlier problem, for what it is worth :)
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Math - Damon, Monday, December 1, 2014 at 2:08pm
to the nearest tens place
55 would be called 60

54.9999999999 would be 50
but
55.00000000001 would be 60
so if it starts with 55 it is 60

It does not make a whole lot of sense, but one must decide consistently :)
0.5 is 1 but 0.499999999 is 0