9.8+6.52= 23.4-9.4+0.6=
7-4.68= 20.9-(3.7-2.7)=
8.5+5.5-5.5= 100-15×2=
13-5.42-2.58= 90÷3×3=
①24.56+1.29+5.44+3.71
②10.37-5.17-2.83
③45.68-(7.84+8.16)
④1.83+2.51-0.83
⑤36.75+(4.25-1.8)
⑥2.72+1.88-1.72+2.12