.data
n1: .byte 10
n2: .byte 0x10
n3: .byte '1'
res: .space 1

.text
.globl main
.ent main
main:
lb $t1, n1
lb $t2, n2
lb $t3, n3
sub $t4, $t1, $t2
add $t4, $t4, $t3
sb $t4, res