①10×10%=
②56%-28%=
③1+0.5% =
④1-0.5% =
⑤1÷1% =
⑥1-98% =
⑦3+150% =
⑧15%×75% =
477﹣199=
5%÷0.01=
36×99=
15﹣+=
5÷﹣÷5=
6.7×0.25×4=
0.4×12.5×8×2.5=
×5÷×5=
飞机的速度是每小时860千米,比火车速度的8倍少20千米,求火车的速度。
x+7%x=5.35 (1-60%)x=5.6
3.9x÷(1+30%)=50 3x+60%x=12
48-25%x=32 4%x-6=0.4
1-0.45=
502-197=
120×50=
80×40%=
602+297≈
1.8×=
15÷=
21×(+)=
45×30=
12.6÷0.3=
15×10=
15×=
0.4×0.2=
=
1.5a-a=
0.25×0.125×8=
0.1×0.4= 16÷0.8= 720﹣180= 0.65+9.35=
:= ×0= ÷51= 0.01×99=