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﹣
=