直接写出得数．
7.8﹣5.8= 3.876﹣
= 35×20%= 2.4÷0.1﹣0.1=
0.035×
= 0.53+100= 1÷8×1÷8= 9.98﹣（1.98+1.2）=
（1）2.2+0.8=
（2）6÷
×
=
（3）0.3××3=
（4）25÷
=
（5）1÷125%=
（6）0×
=
（7）3.2×125×25=
（8）222+78=
直接写出得数．
4.5﹣1.7=
= 2.5×13×4= 4×
÷4×=
8.2÷0.1=
×
= 4.5﹣
= 1+
÷+1=
直接写出得数．
1.2﹣0.12= 1.25×0.16=
×
= 3÷20%= 3÷8+
=
﹣
﹣
= 3÷
﹣÷3= 7×
÷7×= 0.99+0.99×99=
直接写出得数．
7.2+2.8=
8﹣2.5=
0.3+0.6=
0.32+0.8=
2×
=
15×
= 1﹣0.52= 1÷
=
+
= 16×
=
+0= 2.5×4=
﹣
= 1﹣
=
×5=
．