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I ams ure this is not the right section but I really need help to work this out please. If a room 4.8 metres by 3.4 metres what is that in square metres ? TIA.
Answers
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No offence Jasmin but this is basic long multiplication and if it was causing you a problem maybe you should go back and ask your secondary school maths teacher what they were doing during class ?
Assuming you didn't memorise your multiplication tables all the way to the 34 times table ;-) the way you work this sort of thing out in future is as follows:
4.8 x
3.4
Multiply by the 3 first and by the 0.4 afterwards.
3 x 8 = 24, put down the 4 and "carry" the 2 in your head ready to add to the result in the tens column.
3 x 4 = 12. Remember you were "carrying over" 2 so add that to give you 14.
First bit = 144 (i.e. 14 tens and the 4 units you worked out just before)
Ah but recall you were multiplying 4.8 by 3 not 48 by 3, so that's 1 digit after the decimal point so you need to move the decimal point in your answer by 1 too.
Final First bit = 14.4
4 x 8 = 32, put down the 2 and "carry" the 3 in your head ready to add to the result in the tens column.
4 x 4 = 16. Remember you were "carrying over" 3 so add that to give you 19.
Second bit = 192 (i.e. 19 tens and the 2 units you worked out just before)
Ah but recall you were multiplying 4.8 by 0.4 not 48 by 4, so that's two lots of 1 digit after the decimal point, so you need to move the decimal point in your answer by 2 too.
Final second bit = 1.92
Add both bits together
14.4 + 1.92 = 16.32
In fairness this looks rather unwieldy when done in words on a post where one has limited ability to format the text so things line up properly
I'll try a figure only thing below but suspect it'll look all wrong.
4.8 x
3.4
====
14.4
1.92
====
16.32
Assuming you didn't memorise your multiplication tables all the way to the 34 times table ;-) the way you work this sort of thing out in future is as follows:
4.8 x
3.4
Multiply by the 3 first and by the 0.4 afterwards.
3 x 8 = 24, put down the 4 and "carry" the 2 in your head ready to add to the result in the tens column.
3 x 4 = 12. Remember you were "carrying over" 2 so add that to give you 14.
First bit = 144 (i.e. 14 tens and the 4 units you worked out just before)
Ah but recall you were multiplying 4.8 by 3 not 48 by 3, so that's 1 digit after the decimal point so you need to move the decimal point in your answer by 1 too.
Final First bit = 14.4
4 x 8 = 32, put down the 2 and "carry" the 3 in your head ready to add to the result in the tens column.
4 x 4 = 16. Remember you were "carrying over" 3 so add that to give you 19.
Second bit = 192 (i.e. 19 tens and the 2 units you worked out just before)
Ah but recall you were multiplying 4.8 by 0.4 not 48 by 4, so that's two lots of 1 digit after the decimal point, so you need to move the decimal point in your answer by 2 too.
Final second bit = 1.92
Add both bits together
14.4 + 1.92 = 16.32
In fairness this looks rather unwieldy when done in words on a post where one has limited ability to format the text so things line up properly
I'll try a figure only thing below but suspect it'll look all wrong.
4.8 x
3.4
====
14.4
1.92
====
16.32
jasmin please don't be put off by this experience x you will find loads of people on here to help in the a/z that is answerbank there are a lot of nice genuine helpful people, not all here to give sarky help.
Can't believe at times how some people on here that should know better just get a thrill from belittling people and they say young people are disrespectful !!
Can't believe at times how some people on here that should know better just get a thrill from belittling people and they say young people are disrespectful !!
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