9.8×1000= 0.6+0.24= 10﹣9.09= 0.7﹣0.35=
0.5÷10= 0.23+7.7= 39÷10×1000= 100÷25×4=
6.7+3= 4÷100= 5.3﹣0.03= 6.08×100= ．
9.8×1000= 0.6+0.24= 10﹣9.09= 0.7﹣0.35=
0.5÷10= 0.23+7.7= 39÷10×1000= 100÷25×4=
6.7+3= 4÷100= 5.3﹣0.03= 6.08×100= ．
+
=
﹣
= 0.2﹣
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=
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+2÷9=
﹣
= 1.55﹣
+
=
=
=
=
=
= 1﹣
=
=
=
+
=
+
=
=
=
=
=
=
=
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