+
)=3+4=7,这是根据( )计算的。
×27
×0.32+0.68÷ 
÷〔
×(1﹣
)〕
32×25×1.25.
=
+
)×8=( )
( )
C . 10
D .
①16+4÷(
-
)
②1.7+3.98+2.3
③(
+
)×
+
④1÷
⑤4.8×3.9+6.1×4.8
①
②
③
④
⑤
⑥
①
②
③
÷(
)
④78×
⑤
⑥(
)×2.4
)÷13
-
)÷
÷
+
×7
×36×
×
+
)
÷
×
×
+
×
÷(
+
+
)
×2.6+
×2.2+
×10.48+7.52×
)÷
-
)×13]
①3.6÷4+7.4×
-25%=
②(
+
)×15×17=
③403×101=12.5×32×2.5=
④99×
+
=
⑤16.78-3.4-4
=
①21÷0.5÷0.6
②125×88
③2.5×32×12.5
④ 
⑤ 
⑥61×40%+38×
+0.4
×
-
)
×
﹣
×