1.) ½ + √100 - 2 = ...?
2.) 23 + 12 - 30² = ...?
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[tex] \tt \frac{1}{2} + \sqrt{100} - 2[/tex]
[tex] = \tt \frac{1}{2 } + \sqrt{ {10}^{2} } - 2[/tex]
[tex] \tt = \frac{1}{2} + \sqrt{ {10 \times 10}^{} } - 2[/tex]
[tex] \tt = \frac{1}{2} + 10 - 2[/tex]
[tex] \tt = \frac{1}{2} + \frac{20}{2} - 2[/tex]
[tex] \tt = \frac{21}{2} - 2[/tex]
[tex] \tt = \frac{21}{2} - \frac{4}{2} [/tex]
[tex] \tt = \frac{17}{2} [/tex]
[tex] = \bf8 \frac{1}{2} [/tex]
[tex] \\ \\ [/tex]
[tex] \tt23 + 12 - {30}^{2}[/tex]
[tex] \tt = 23 + 12 - (30 \times 30)[/tex]
[tex] \tt = 23 + 12 - 900[/tex]
[tex] \tt = 35 - 900[/tex]
[tex] = \bf - 865[/tex]
Penjelasan dengan langkah-langkah:
~ No 1
½ + √100 - 2
= ½ + √10² - 2
= ½ + 10 - 2
= ½ + (10 - 2)
= ½ + 8
= 8½
-
~ No 2
23 + 12 - 30²
= 23 + 12 - (30 × 30)
= 23 + 12 - 900
= 35 - 900
= - (900 - 35)
= - 865
