5-4
By rounding each number to the nearest 10, estimate:
47
×
16
197
47×16
why maths is so tough
If two carriers of the gene for albinism marry, each of their children has a probability of 0.25 of being albino. If such a couple...
1 1/9 x 2/5
is 95
a prime number
4/7 x 3 1/3
is 89 a prime number
- □\sqrt{\Box}□
is 95 a prime number
