[tex]a)2(1 + 4) = 2 \times 1 + 2 \times 4 = 2 + 8 = 10[/tex]
[tex]c)10(5 + 4 - 2) = 10 \times 5 + 10 \times 4 - 10 \times 2 = 50 + 40 - 20 = 90 - 20 =70[/tex]
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[tex]a)2(1 + 4) = 2 \times 1 + 2 \times 4 = 2 + 8 = 10[/tex]
[tex]c)10(5 + 4 - 2) = 10 \times 5 + 10 \times 4 - 10 \times 2 = 50 + 40 - 20 = 90 - 20 =70[/tex]