直接写出得数
5.6+6.5= 9﹣1.9= 6÷0.25= 0.7×0.3=
9.6÷3.2×0.8= 4.78﹣1.7×0.4= 4998÷202≈（估算） 6b÷3+0.5b=
口算：
420×20= 9+0.1= 0.3×1000= 62+99+38=
144÷12= 1﹣0.2= 0.85÷100= 2﹣0.35﹣0.65=
口算：
0.4×0.02= 3.5+7.6= 1.23÷3= 2.4×2.5=
16÷1.6= 0.9÷0.01= 7÷0.25= 99×0.25=
1.2×0.4+0.4×1.3= 4×（1.5+0.25）=
直接写得数．
4.5+7.6= 9﹣0.18= 0.9×9= 3.6÷9=
0.2×3.3= 1÷0.25= 0÷5.4= 3.89×0=
7.25+2.75= 10.8﹣8= 2.5×4= 80÷0.1=
5.6+2.8= 3.2×0.4= 6÷100= 740﹣250= 15.28﹣（5.28+5.8）=
18.4÷0.02= 2.36+1.44= 0.46×1000= 3.02×0.8= 1.56×3.5+0.5×1.56=
= 7×
= 
= 
×6÷
=
×
= 
×16= 
÷2= （
）×16=．