IM 7.5.5 Practice: Representing Subtraction

Write each subtraction equation as an addition equation.
[math]a-9=6[/math]
[math]p-20=-30[/math]
[math]z-\left(-12\right)=15[/math]
[math]x-\left(-7\right)=-10[/math]
Find each difference. If you get stuck, consider drawing a number line diagram below.
[math]9-4[/math][br]
[math]4-9[/math][br]
[math]9-\left(-4\right)[/math]
[math]-9-\left(-4\right)[/math]
[math]-9-4[/math]
[math]4-\left(-9\right)[/math][br]
[math]-4-\left(-9\right)[/math]
[math]-4-9[/math]
If you get stuck, consider drawing a number line diagram.
[size=150]A restaurant bill is $59 and you pay $72. What percentage gratuity did you pay?[/size]
Find the solution to each equation mentally.
[math]30+a=40[/math]
[math]500+b=200[/math]
[math]-1+c=-2[/math]
[math]d+3567=0[/math]
One kilogram is 2.2 pounds. Complete the table.
What is the interpretation of the constant of proportionality in this case?[br][br]______ kilogram per pound[br]
One kilogram is 2.2 pounds. Complete the table.
What is the interpretation of the constant of proportionality in this case?[br][br]______ pounds per kilogram
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– GeoGebra Classroom Activities, IM 6 – 8 Math

Informazioni: IM 7.5.5 Practice: Representing Subtraction