Emily made 4 stacks of wooden blocks. The first stack was 9 blocks tall. The second stack was 10 blocks taller than the first. The third stack was 17 blocks shorter than the second stack, and the last stack was 7 blocks taller than the third stack. How many blocks did Emily use in all?
+157 first one
9
second one
19
third one
2
fourth one
9
this giving you a total of 39
