直接写得数
400÷50= 60×30= 720÷9= 110×2=
620÷20= 4800÷400= 120×3= 0×101=
73×20= 90×60= 400÷25= 800÷20=
50×48= 2400÷60= 18×5= 3×8×5=
相关试题
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=
+
= ②估算：499.8×10.1≈
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