{"id":153,"date":"2020-01-27T10:41:43","date_gmt":"2020-01-27T10:41:43","guid":{"rendered":"http:\/\/learnlearn.uk\/maths\/?page_id=153"},"modified":"2020-01-28T01:24:43","modified_gmt":"2020-01-28T01:24:43","slug":"substituting-numerical-values-formulae-expressions","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/maths\/substituting-numerical-values-formulae-expressions\/","title":{"rendered":"Substituting Numerical values into Formulae and Expressions"},"content":{"rendered":"
\n

Example 1<\/h2>\n
\n\n

Example 1<\/h3>\n
\n

Evaluate:<\/strong><\/p>\n

4y – 7<\/p>\n

when\u00a0y = -4<\/p>\n<\/div><\/div>\n

<\/i>Answer<\/div>
\n

4 * -4 – 7<\/strong><\/p>\n

= -23<\/strong><\/p>\n<\/div><\/div>\n\n<\/div>

Example 2<\/h2>\n
\n\n

Example 2<\/h3>\n
\n

Evaluate:<\/strong><\/p>\n

7 – p<\/p>\n

when p = -8<\/p>\n<\/div><\/div>\n

<\/i>Answer<\/div>
\n

7 – -8<\/p>\n

= 15<\/p>\n<\/div><\/div>\n\n<\/div>

Example 3<\/h2>\n
\n\n

Example 3<\/strong><\/p>\n

\n

If a=2, b=-5, c=1\/2 what is:<\/strong>
\nI)\u00a0 \u00a0ab
\nII)\u00a0 \u00a0b\/a
\nIII)\u00a0 3c\u00b2
\nIV) (3c)\u00b2<\/p>\n<\/div><\/div>\n

<\/i>Answers<\/div>
\n

I) -10<\/p>\n

II) -2.5<\/p>\n

III) 3 x (0.5 x 0.5) = 0.75<\/p>\n

IV) (3 x 0.5) x\u00a0(3 x 0.5) = 2.25<\/p>\n<\/div><\/div>\n

 <\/p>\n\n<\/div>

Revision Material<\/h2>\n
\n\n

Revision Lesson (MyiMaths)<\/a><\/p>\n

Online Practice Test<\/a><\/p>\n

Practice Questions Paper ( Only Questions 1 to 7 – the rest are GCSE Level)<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

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