计算下列各题（能简算要简算）．
5.18+0.73+0.82 0.75×1.8÷1.5 12.5×7.1×0.8
6.12×99+6.12 8.6÷0.86+8×0.35 5.6×（18.5﹣8.5÷0.5）
甲数的75%是48，乙数比48少
，乙数比甲数少百分之几？
直接写得数．
3.6+5.4= 650﹣100= 0.008×1000= 70÷0.01=
2.8×0.5= 25÷
= 8.1÷0.03=
+3=
×
=
﹣
= 1÷
=
×
=+
+
=
×0.25=
﹣0.6=1﹣7%=
直接写出下面各题的结果．
56+37= 80﹣16= 31.5+5= 12﹣1.1=
1.2×0.2= 2.87÷0.7=
=
=
30÷50= 25×8=
=
=
12×
1÷
= 0×
=
×2÷×2=
直接写出得数．
684+198= 14.3﹣0.8= 2.5×40= 0.35×99+0.35=
÷6=
1﹣
+
= 3.7×1000= 7×8×（
+
）=
×
=
÷2=
÷
×0=
×4+= 7﹣
=
÷
= 4×
×
=×4÷×4=
直接写得数．
180+470= 5÷8= 25×2.4= 12﹣
=
÷14=
+
= 1.25×
×0.8=
×=
÷
=
﹣
=
×4÷4×= 2.4×
=
（
+
）×16= 12.01×9.98≈ 2÷0.2%= 60×20%=