① +0.25+ +1.75
② + -
③ -( - )
④4- -
⑤ ×3.6+ ×3.6
⑥6.45- -0.45
3.7×1.4×0.05 12.5×0.4×2.5×8
①#(-)÷
②# 8.8-6.75+9.2-0.25
③÷(-)×
④÷[(-)×)]
①25×32×1.25
②(+0.375)÷(×)
③×+÷7
④6﹣(+)
①26×15﹣200
②8×4×12.5×0.25
③×+
④12÷[()×]
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]