twenty
4 x 10 = 40 = 2 x 20
Twenty of them.
8 (sum means add 2x10 +10x2 =40 then divide by 5 to find the amount of fives that fit=8)
5 x 2 = 10
2 1/2
Twenty of them.
8 (sum means add 2x10 +10x2 =40 then divide by 5 to find the amount of fives that fit=8)
15 of them.
5 x 2 = 10
2 1/2
Well, 25 twos is equal to 50. So 10 fives are equal equal to 25 twos.
By ones By twos By fours By eights By tens By twenties By fourty (if you want to count that one)
6 fives
15
213 twos.
15 x 2 = 3030 = 5 x 6