用你喜欢的方法计算下面各题
÷〔
×(1﹣
)〕 (
﹣
)×
(20﹣1.25×0.8)÷0.19 6.88×7.8+3.2×6.88﹣6.88
5.58﹣
+5.42﹣
325×0.36+6.75×36.
直接写出得数.
×
=
×1.2= 32×1
=
×
÷
×
=
1÷0.1﹣0.1×1= 2.8﹣(1
+
)=
+21÷56= 1252﹣998=
16×
×
=
﹣
= 52=
+
= 100÷0.01=
×
×
= 28﹣
﹣
= 13×4÷13×4= 2÷1
+2×
=
6.54﹣2.8﹣1.2=(
+
﹣
)×30=
计算:
①2
﹣1.75= ;②30
×
= 1
;
③(
+
+
)÷
= ;
④30×29﹣29×28+28×27﹣27×26+…+4×3﹣3×2= .
⑤1÷(1﹣
)×(1+
)÷(1﹣
)×(1+
)÷…÷(1﹣
)×(1+
)= ;
⑥方程:65%(x﹣1)=37%(x+1)+0.1的解是x= .
直接写结果.
+
= 4.75+1
= 25×4= 1.6×5=
×30=
2﹣1
= 960÷80= 1﹣47%= 10×50%= 0.5﹣
=