ADDITION
43
83 - 5
78
4 x 3
12
10 / 2
What number is missing?
9, 18, 27, _, 45
36
127 + 823
950
412 - 93
319
6 x 9
54
73 / 9
A school has 120 students.
67 students play basketball, 29 students play volleyball. How many students play neither?
24 students.
2,345 + 1,876
4221
8385 - 820
7,565
13 x 6
96 / 4
24
DOUBLE JEOPARDY
I add six to eleven and get five. How?
Adding 6 to 11 refers to adding hours on a clock. After 12, the count resets, so 11 + 6 - 5 o’clock.
5,678 + 8401 + 238
14,317
8,7112
28 x 54
1,512
9,646 / 13
742
If 1 book weighs 1 pound and a half book I weighs 1.5 pounds, how much do 12 books weigh?
12 pounds.
Proportion: 1 book = 1 pound.
23,995 + 53,033 + 9,397 + 13,575
100,000
98492 - 7154
91,338
DOUBLE JEOPARDY
487 x 23 x 98
1,097,698
726 / 5/8
1,161.6
OR
1,161 r 3
A person walks 3 miles south, then 4 miles east. What is the straight-line distance from their starting point?
5 miles.
Pythagorean Theorem: a^2 + b^2 = c^2
a = 3, b = 2
3^2 + 4^2 = c^2
9 + 16 = c^2
c^2 = 25
c = 5