直接写得数．
50×12= 3.02+0.98= 2﹣0.44= 3×2+9×2=
0.39+1.11= 75÷25×3= 6.27﹣1.55﹣1.45= 4×7×25=
126.5÷100= 0.18×10= 1540﹣240= 350÷70=
直接写得数．
50×12= 3.02+0.98= 2﹣0.44= 3×2+9×2=
0.39+1.11= 75÷25×3= 6.27﹣1.55﹣1.45= 4×7×25=
126.5÷100= 0.18×10= 1540﹣240= 350÷70=
+
=
÷7=
×
=
÷
=
×8= 9÷
= 15×
=
﹣
=
÷
=
×
=
=
÷
=
+
=
×
=
÷6=
×8=
+
=
= 0+
=
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= 1÷
=
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= 1﹣
= 1÷
=
﹣
=
= 51×199≈（
+
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=
÷
= 1÷
=
+
= 16÷
=
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