(1)6.27*3.6+37.8*0.36(2)(0.64+0.32)除以0.64(3)369*0.99+3.69(4) 還沒寫完,(4)13.5*2.5-0.35*25 這4道題請簡便運算,

(1)6.27*3.6+37.8*0.36(2)(0.64+0.32)除以0.64(3)369*0.99+3.69(4) 還沒寫完,(4)13.5*2.5-0.35*25 這4道題請簡便運算,

(1)=(6.27+3.78)*3.6
=10.05*3.6(你是不是打錯數位了?)
=36.18
(2)=0.64/0.64+0.32/0.64
=1+0.5
=1.5
(3)=3.69*99+3.69
=(99+1)*3.69
=369