Multiplication by 2,5 and 10 By Asinate

Learning -Intention-W.A.L.T-multiply numbers up to 100.
Success Criteria-I know I am successful when I can multiply numbers using skip counting,doubles and repeated addition.

Problems:How many marbles are there altogether.
1.)How many marbles are there altogether?
2 children had 10 marbles each=20
I know it is 20 because double 10+10=20,  I multiply   10X2=20 
 I skip counting by two's  - 2,4,6,8,10,12,14,16,18,20   




2.)Poppy,Sam,Emma and have 5 marbles each .How many marbles do they have altogether.I know it is 15 because I skip count in five
5,10,15 and I use repeated addition 5+5+5=15 and I multiplied  5X3= 15

3.)Bently ate 3 of  biscuits .There 10 biscuits in each packet.How many biscuits did he ate altogether ?I use repeated addition 10+10+10=30 I multiplied 3 x 10=30. I skip count by ten.10+10+10=30