-1.5 3 - 4.5 -4
547+198=
0.6-0.28=
5.5×=
3.6÷0.36=
7.7÷=
=
×5÷×5=
①10×10%=
②56%-28%=
③1+0.5% =
④1-0.5% =
⑤1÷1% =
⑥1-98% =
⑦3+150% =
⑧15%×75% =
①0.75x-0.25=11
②x+x=0.875
③x:=: