化简比． 1.8：2.4 1.2吨：750千克．
直接写出得数．÷=+=÷=×= 1÷0.25=÷1=÷3=﹣=
直接写出得数．÷=×3= 6×=+×7= 100÷10%=÷1=÷7=
=÷21= 2.4×= 42÷=×= 10×10%= 3﹣1= 3π= 1﹣+=×÷×=
÷8= 1÷0.01=×6=÷= 1÷=+=﹣=÷=+=×=
直接写得数．========
1.8：2.4 1.2吨：750千克．
÷
=
+
=
÷
=
×
=
÷1=
÷3=
﹣
=
÷
=
×3= 6×
=
+
×7=
÷1=
÷7=
=
÷21= 2.4×
= 42÷
=
×
=
= 3π= 1﹣
+
=
×
÷
×
=
÷8= 1÷0.01=
×6=
÷
= 1÷
=
+
=
﹣
=
÷
=
+
=
×
=
=
=
=
=
=
=
=
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