9407 /www/nrich/html/content/id/9407/ 1 0000-00-00T00:00:00 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0">After working through <a href="/9406">Just Four Numbers</a> you can move onto trying to get answers up to $60$ using multiplication as well as addition and subtraction.<br></br> <br></br> Taking the example we started in Just Four Numbers we could now have,<br></br> <br></br> $(3 \times 10) + 1 = 31$<br></br> $10 \times (7 - 3 ) -4 = 39$<br></br> <br></br> So you could carry on with these four numbers and try to getas many of the answers from $1$ to $60$.<br></br> Or, of course choose you own four numbers ( remember they&#39;re to be from $1$ to $10$ and no duplications and you can only use a number once in each calculation you invent.</mdoxml> <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0"><div class="embed"> <h2>Extended Just Four Numbers</h2> After working through <a href="/9406">Just Four Numbers</a> you can move onto trying to get answers up to $60$ using multiplication as well as addition and subtraction.<br></br> <br></br> Taking the example we started in Just Four Numbers we could now have,<br></br> <br></br> $(3 \times 10) + 1 = 31$<br></br> $10 \times (7 - 3 ) -4 = 39$<br></br> <br></br> So you could carry on with these four numbers and try to getas many of the answers from $1$ to $60$.<br></br> Or, of course choose you own four numbers ( remember they&#39;re to be from $1$ to $10$ and no duplications and you can only use a number once in each calculation you invent.</div> <br></br> <h3><span style="font-weight: bold;">Why do this problem?</span></h3> <div>text</div> <br></br> <h3>Possible approach</h3> <div>text</div> <br></br> <h3>Key questions</h3> <div>text</div> <br></br> <h3>Possible extension</h3> <div>text</div> <br></br> <h3>Possible support</h3> <div>text</div> <br></br> <br></br></mdoxml> 2 4 0 1 0 0 0