One Mouse and seven cats

Sonesulilat has 8 crickets on the grill. He eats 3 of them; how many are left? If there are 3 nagas, and each naga has 7 heads, how many heads are there in all? And just what are those 7 cats going to do with 1 mouse? Easy number questions like these, each with a full-page picture, make it fun for children to learn basic arithmetic.