Multiplication
7 x 9=
7 x 9= 63
25 divided by 5 equals
25 divided by 5 equals 5
102
100
1/2 + 2/2
3/2
a line straight up and down
Vertical
300 x 7=
300 x 7=2,100
60 divided by 4 equals
60 divided by 4 equals 15
105
100,000
1/4 + 1/2
6/8 or 3/4
When two numbers are equal
they are equivalent.
50 x 5=
50 x 5= 250
1,000 divided 10 equals
1,000 divided 10 equals 100
104
10,000
2/5 + 1/2
9/10
name the two parts of a fraction (one try)
numerator/denominator
1,000 x 100
1,000 x 100= 100,000
100,000 divided 100 equals
100,000 divided by 100 equals 1,000
103
1,000
1/3 + 1/4
7/12
In reply to an inquiry about the animals on his farm, the farmer says: “I only ever keep sheep, goats, and horses. In fact, at the moment they are all sheep bar three, all goats bar four, and all horses bar five.” How many does he have of each animal?
The farmer has 3 sheep, 2 goats, and 1 horse.
3x6,000=
3x6,000=18,000
144 divided by 12 equals
144 divided by 12 equals 12
106
1,000,000
2/3 + 2/4
14/12 or 1 2/12 or 1 1/6
One brother says of his younger brother: “Two years ago, I was three times as old as my brother was. In three years’ time, I will be twice as old as my brother.” How old are they each now?
One way to solve this math riddle is to use even numbers: The older brother will be twice as old as his younger brother in three years’ time. This immediately rules out the older brother currently being 8, 11, and 14, so he must be 17, and the younger brother 7. Two years ago, they were 15 and 5 respectively, and in three years’ time, they will be 20 and 10.