Use four 4 and any of the four operations to make the numbers 1 through 10. Example 1= 4+4 over 4+4

1= 6= 7= 8= 9= 10=

2=
3=
4=
5=

You could just google search this and you will get the four four answers for 1 to 100 very quickly. This is just a great fun way to spend time with numbers : )