Missing Angles
What kind of triangle is this?
50
90 40
right triangle
3/4 x 1/2
3/8
2×4+3
11
Subtract:
7/11 - 2/11 =
5/11
9.1 - 4.6=
4.5
What is the missing angle of this triangle ?
61 33
61° + 33° + ? = 180°
94° + ? = 180°
= 180° − 94°
= 86°
2/3 x 4/5
8/15
10÷5×4
8
Add:
2/10 + 4/10
3/5
62.38
+ 66.24
128.62
What is the missing angle of this triangle ?
53 37
53° + 37° + ? = 180°
90° + ? = 180°
= 180° − 90°
= 90°
3/4 x 1/9
1/12
8×6÷6+6
14
Subtract:
3/6 - 1/6
1/3
In 45.12, in which place is the 2?
Hundredths
What is the missing angle of this quadrilateral ?
76 68 147
76° + 68° + 147° + ? = 360°
291° + ? = 360°
= 360° − 291°
= 69°
4/5
x 2 (2/5)
4/5 x 12/5
= 48/25
= 1 (23/25)
84 ÷ 4 × 6 − 114
12
Add:
7/20 + 9/20
4/5
72.34
- 34.78
37.56
What is the missing angle of this quadrilateral ?
62 91 132
62° + 91° + 132° + ? = 360°
285° + ? = 360°
= 360° − 285°
= 75°
1 (3/4)
x 3 (4/5)
7/4 x 19/5
= 133/20
=6 (13/20)
44 × 5 ÷ (9 + 11)
11
At a pie-eating contest, Emilio got through 5/6 of a pie before time was called; Noah finished just 1/2 of a pie. How much more pie did Emilio eat than Noah?
2/6
Multiply the numerator and the denominator of 12 by 3 to find an equivalent fraction.
Now subtract the fractions. Subtract the numerators and keep the denominators the same.
5/6 − 3/6 = 2/6
Nicholas runs 11.76 kilometers every morning. One day, he runs 2.68 kilometers and then stops to take a break. How much further does Nicholas have left to run?
11.76 - 2.68 = 9.08