⑴____ A. desk B. mask C. skate
⑵____ A. clasp B. crisp C. grasp
⑶____ A. first B. must C. fast
⑷____ A. star B. post C. study
87+78=____ 65+56=____ 34+43=____ 54+45=____
87-78=____ 65-56=____ 43-34=____ 54-45=____