题目五年级数学(方程)习题及答案(1) x+53=57 (2) x+68=75 (3) x+55=65(4) x-65=13 (5) x-45=10 (6) x-36=27(7) x+4.7=10.5 (8) x+3.2=8.1 (9) x+6.1=11.2(10) x-2.6=3 (11) x-0.3=7.3 (12) x-0.8=5.9(13) 98+x=194 (14) 66+...