Added additional proportion files

proportions-extra.py

@@ -0,0 +1,17 @@
+# print(1 + 2/3 + 3 + 4/5 - 7)
+
+x = 2/3
+print("10x = ", 10 * x )
+print("9x = ", 9*x)
+print("10x - 9x = ", 10*x - 9*x)
+print("x = ", x)
+
+print("-----------------------------")
+
+y = 4/9
+print(y)
+print( 10 *y )
+print(9*y)
+
+print("-----------------------------")
+

proportions-practice.py

@@ -0,0 +1,109 @@
+# converts string input (even fractions) to float
+def string_frac(in_string):
+    if "/" in in_string:
+        nd = in_string.split("/")
+        n = float(nd[0])
+        d = float(nd[1])
+        ans = n/d
+        return ans
+    else:
+        ans = float(in_string)
+        return ans
+
+
+# Simplest one-step addition
+def one_step_add():
+    import random
+    # Display problem
+    a = random.randint(-4,10)
+    b = random.randint(2,24)
+    print("x + ", a, " = ", b)
+    ans = float(input("x = "))
+    answer = b-a
+    # Test input
+    if ans==answer:
+        print("Correct! \n")
+    else:
+        print("Try again")
+        print("The correct answer is ", answer, "\n")
+
+
+# One-step additon with negative numbers
+def one_step_subtract():
+    import random
+    a = random.randint(-19,-1)
+    b = random.randint(2,24)
+    print(a, " + x = ", b)
+    ans = float(input("x = "))
+    # test
+    answer = b-a
+    if ans==answer:
+        print("Correct! \n")
+    else:
+        print("Try again")
+        print("The correct answer is ", answer, "\n")
+
+# One-step multiply
+def one_step_mult():
+    # Uses string_frac(<input string>)
+    import random
+    a = random.randint(1,11)
+    b = random.randint(2,24)
+    print(a, "x = ", b)
+    print("Round your answer to two decimal places.")
+    ans_in = (input("x = "))
+    answer = round(b/a,2)
+    # test
+    if string_frac(ans_in)==answer:
+        print("Correct! \n")
+    else:
+        print("Try again")
+        print("The correct answer is ", answer, "\n")
+
+
+# One-step divide
+def one_step_div():
+    import random
+    a = random.randint(1,11)
+    b = random.randint(2,24)
+    print("x/", a, " = ", b)
+    ans = float(input("x = "))
+    answer = b*a
+    # test
+    if ans==answer:
+        print("Correct! \n")
+    else:
+        print("Try again")
+        print("The correct answer is ", answer, "\n")
+
+
+# Two-step problems
+def two_step():
+    import random
+    # Uses string_frac()
+    a = random.randint(1,11)
+    b = random.randint(-7,12)
+    c = random.randint(2,36)
+    print(a, "x + ", b, " = ", c)
+    print("Round answer to two decimal places")
+    ans_in = input("x = ")
+    answer = (c-b)/a
+    # test
+    if round(string_frac(ans_in),2)==round(answer,2):
+        print("Correct! \n")
+    else:
+        print("Try again")
+        print("The correct answer is ", answer, "\n")
+
+
+# test loop
+for a in range(2):
+    one_step_add()
+    one_step_subtract()
+    one_step_mult()
+    one_step_div()
+    two_step()
+    print(" ")
+
+two_step()
+two_step()