15÷0.25= 1.5×= 2.4+1= 1÷1.25×8=24×= = 10= 8+=×1.8= = = 0.78+1+0.32=
估算． 83×29 90×11 59÷5 243÷6．
用竖式计算（带★的要验算） 213×6= ★71÷3= ★38÷2= 305×8=
竖式计算． 66×42 740×90 860÷43 745÷25 805×48 327÷42 95×120 752÷28．
= 2.4+1
= 1÷1.25×8=
= 
= 10
= 8
+
=
×1.8= 
= 
= 0.78+1
+0.32=
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