26×50= 10−0.86= 25×0.2÷25×0.2=
8÷ = 12×( )= 2.5×3.5×0.4=
①713÷23×28
②8.5×99
③9.6−11÷7+ ×4
④87.58-(7.58-3.8)
⑤1.25×25×3.2
⑥ ×3.5+5.5×80%+1÷1
① x+0.2x =9.5
②2.5:5= :
③0.45×(x−3.7)=9
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