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Solution 1.1:2c

From Förberedande kurs i matematik 1

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Hela uttrycket kan vi dela upp i två delar
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We can divide up the whole expression into two separate parts
<center><math>\bbox[#FFEEAA;,1.5pt]{\,3\cdot(-7)\,}-\bbox[#FFEEAA;,1.5pt]{\,4\cdot(6-5)\,}</math></center>
<center><math>\bbox[#FFEEAA;,1.5pt]{\,3\cdot(-7)\,}-\bbox[#FFEEAA;,1.5pt]{\,4\cdot(6-5)\,}</math></center>
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som vi kan räkna ut separat och sedan subtrahera från varandra.
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which we first calculate and then combine.
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Det första deluttrycket är lika med
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The first part of the expression equals
<center><math>3\cdot(-7) = -21</math></center>
<center><math>3\cdot(-7) = -21</math></center>
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medan det andra deluttrycket blir
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whilst the second expression becomes.
<center><math>4\cdot(6-5) = 4\cdot 1 = 4\,</math>.</center>
<center><math>4\cdot(6-5) = 4\cdot 1 = 4\,</math>.</center>
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Sammantaget får vi
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Combining, we obtain
<center><math>\bbox[#FFEEAA;,1.5pt]{\,3\cdot(-7)\,}-\bbox[#FFEEAA;,1.5pt]{\,4\cdot(6-5)\,} = \bbox[#FFEEAA;,1.5pt]{\,-21\,}-\bbox[#FFEEAA;,1.5pt]{\,4\,} = -25\,</math>.</center>
<center><math>\bbox[#FFEEAA;,1.5pt]{\,3\cdot(-7)\,}-\bbox[#FFEEAA;,1.5pt]{\,4\cdot(6-5)\,} = \bbox[#FFEEAA;,1.5pt]{\,-21\,}-\bbox[#FFEEAA;,1.5pt]{\,4\,} = -25\,</math>.</center>
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Current revision

We can divide up the whole expression into two separate parts

3(−7)−4(6−5)

which we first calculate and then combine.

The first part of the expression equals

3(−7)=−21

whilst the second expression becomes.

4(6−5)=41=4.

Combining, we obtain

3(−7)−4(6−5)=−21−4=−25.
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