﹣
= 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﹣
=
直接写出得数.
6×=
=
102×O=
(0.27+0.9)÷9=
直接写出得数.
608÷4= 1﹣0.25= 0.8×0.125=
1×
=
﹣
=