口算．
18×5= 250×3= 150×6= 45×2=
2×370= 7×14= 280×3= 240×4=
720﹣40= 280÷4= 8×25= 4000÷5=
28×3= 457﹣50= 240﹣90= 79×20=
160×4= 5×160= 350+60= 45+38=
相关试题
直接写出得数．
0.333×3≈ 0.375×0.375= 734﹣298= 24
÷8=
2.8×25+1.2×25= 0.48×
= 1.25×
×8= 8.2+0.54+0.46=
直接写得数．
①10﹣4.7= ②
÷5.25= ③
÷
= ④1÷
= ⑤4÷9×
=
⑥3.5÷40= ⑦
+6.25= ⑧0.74×100= ⑨12.2+8%= ⑩15×（
+
）=
= ④
﹣
=
÷
= ⑥3.9÷13= ⑦0.125×0.8= ⑧
×
=直接写出得数．
4÷0.8= 0÷
= 1﹣
= 100×1%=
0.45×1000= 9÷
= 8.7﹣7=
+=
786﹣298= 3.14×8=
÷
= 25×0.7×4=
2﹣2÷3=（
﹣0.375）×5=
×
÷×= 75﹣2.1﹣2.9=
= 4﹣
=
×12=（4.2+
）×2×0=
×
= 3×1
+3×
÷1+
+
）÷
= 4×
×0.25= 0.125×32=
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