- = - = 7.8+0.9=
236+99= 7.5-(2.5+3.8)=
=21.32-6.32+3.5
=15+3.5
=18.5 ( )
改正:
=12.36-(7.5+2.5)
=12.36-10
=2.36 ( )
①87×99+87
②25×32×125
③49.28-(6.28+19.61)
④263-45+137-55
⑤77×116-77×16
张羽同学付给售货员15元,他可能买了哪两本书?售货员找给他多少元?