1.5×0.5 1.5 7.2÷0.7 7.2 8.3÷0.91 91×0.083
16.45=×=×
1.645=×=×
①1×=1-
②2×=2-
③3×=3-
④4×=4
12﹣3.6= 12×0.5= 36×25%= ×6+=
+= ÷4= 0××5= 28÷1.25÷8=
1.5×1= 910÷70= 2.2﹣1.9= 6÷7= 435+199=
+= -= ÷= 20×= ×=