一堆煤9天烧完,平均每天烧这堆煤的 .
列式:
列式:
40×50= 30×20= 25×4= 0.9-0.7=
80×5-400= 36×10= 16+40= 3.8+4.2=
1-
= 1+2.5=
14×50= 40×60= 4500÷5= 36÷3=
+
=
+
= 1-
=
-
=
40×20= +
= 400÷5= 0÷1000=
960÷6= -
= 30×30= 12×50=