口算．5.1÷1.7= 6.3÷0.09= 6.2÷0.1= 0.28÷O.7=2.5÷0.5= 10÷0.5= 10÷0.25= 7.8÷0.6=1÷0.5=
直接写得数． 0.25×16×4=+== 0.85+0.2=
直接写得数．= 3.4×25×4=== 5.05﹣0.5= 400×5%===
60的的是多少？
直接写得数 0.75÷15= 3.2+1.68= 7.5﹣（2.5+3.8）=×5.6= 8.1﹣6= 28×30=×25=+8.4=
直接写出得数．= 45×= 4﹣1= 0.77+0.3= 2+2%===×÷×=
+
=
=
= 3.4×25×4=
=
=
=
=
的
是多少？
×5.6=
= 28×30=
×25=
+8.4=
= 45×
= 4﹣1
= 0.77+0.3=
=
=
×
÷
×
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