Models of Subtraction
Fact Triangles
Angles and Subtraction
Subtracting Fractions
Solving Equations
100
There are 162 games in the regular season in Major League Baseball. A team has played 94 games. How many more games do they have left to play?
What is 66
100
Give the other addition fact in the fact triangle: -2 + 8 = 6
What is 8 + -2 = 6
100
Angle m and n form a linear pair. Angle m measures 118 degrees. What is the measure of angle n?
What is 72 degrees
100
5/8 - 1/8
What is 1/2
100
Solve for x. Make sure to show your steps. x + 8 = 15
What is x + 8 = 15 - 8 - 8 x = 7
200
A pan of water started at a temperature of 63 degrees F. After being heated for 10 minutes, it reached its boiling point of 212 degrees F. How much did the temperature change?
What is 149 degrees
200
Give one subtraction fact in the fact triangle 7 + -9 = -2
What is -2 - 7 = -9 or -2 - -9 = 7
200
Two angles in a triangle measure 43 and 55 degrees respectively. What is the measure of the third angle?
What is 82 degrees
200
1/3 - 1/6
What is 1/6
200
Solve for m. Make sure to show your steps. m - 11 = 9
What is m - 11 = 9 + 11 +11 m = 20
300
A hamster weighing 167 grams loses 19 grams. What is its new weight? Write the problem as an addition problem and as a subtraction problem. Then solve.
What is 167 + -19 = 148 167 - 19 = 148
300
Give the other two facts in the fact triangle. Then solve for the variable. 25 + m = 20 20 - m = 25
What is m + 25 = 20 20 - 25 = m m = -5
300
Two angles are vertical angles. One angle measures 17 degrees. What is the measure of the other angle?
What is 17 degrees
300
3/4 - 2/5
What is 7/20
300
Solve for g. Make sure to show your steps. g + 26 = 14
What is g + 26 = 14 - 26 - 26 g = -12
400
During the month of August, a realty company sold 108 homes. During the month of September, the realty company sold 85 homes. Calculate the change in the number of sales for the realty company. (Hint: If the sales went down, will your answer be positive or negative?)
What is -23
400
Give the other three facts for the fact triangle with a + 4 = -9
What is 4 + a = -9 -9 - a = 4 -9 - 4 = a a = -13
400
One angle measures 41 degrees. What is the measure of its complement? What is the measure of its supplement?
What is complement =49 degrees supplement = 139 degrees
400
4 and 7/10 - 3 and 4/15
What is 1 and 13/30
400
Solve for k. Make sure to show your steps. k - 9 = -13
What is k - 9 = -13 + 9 = + 9 k = -4
500
Marcus studied for his science test for 2 hours and 15 minutes. Jennifer studied for her science test for 1 hour 33 minutes. How much longer did Marcus study than Jennifer?
What is 42 minutes
500
Give the other 3 facts for the fact triangle. Then solve for the variable. -20 - b = -6
What is -20 - -6 = b or -20 + 6 = b b + -6 = -20 -6 + b = -20 b = -14
500
Find the measures of the missing angles in the picture.
What is the measure of angle... a = 30 degrees b = 150 degrees c = 30 degrees d = 88 degrees e = 92 degrees f = 92 degrees g = 120 degrees h = 120 degrees i = 60 degrees
500
5 and 1/2 - 4 and 5/6
What is 2/3
500
Solve for d. Make sure to show your steps. -47 + h = 63
What is -47 + h = 63 +47 +47 h = 110
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