①24×( - + )
②15×( + )×17%
③1.3×37.5%+2.7×
④ ÷[( - )× ]
3.5+2.5= 10﹣0.35= 0.56÷0.7= 20%×5%= 12:2.4=
25×0.8= 9﹣2= 3.75+1= 0÷18= :=
+ = 1- = 1.25× = - =
0.9+99×0.9= 0÷ = 1÷ = -0.5=
0.6×101= 3.2×2.5×12.5=
⑴3.14×52×8﹣3.14×42×7.5 ⑵(+)÷ ⑶4.6×[1÷(2.1﹣2.08)]
① + + +
② × + ÷
③3.8×9.9+0.38
④(8+ )÷4
⑤6÷ + ÷6
⑥ ÷[( + )× ]
①3.5×0.6﹣5.4÷4.5
②0.6÷[(1+75%)×]
③☆()
④☆
(24.6+5.4)×(75﹣34.5÷2.3) 2.5×0.8×4×12.5
(2.8+2.8+2.8+2.8)×2.5 6+2.4+3+7.6