= 
×
= 
×7= 
×3=
= 9×
= 
×
= 
×100=
= 
×
= 
÷6×=（ ）．| A．1 | B．36 | C． |
+0.25=
×
= 21÷
=
×
÷×= 
÷÷=
×12.1﹣1= 
+
÷
= 
= 
= 
= 
=
= 0.42﹣0.32= 5.47﹣1.8﹣3.2= 0.25×8.5×4= 
×
=
×
=
﹣0.6=
+
= 
=b×
=c×
，a、b、c中最大的数是（a、b、c均不为0）（ ）| A．b | B．a | C．c |
= 
= 
= 
=
= 
= 
= 
=
= 
= 
×3=
×12和 12×的意义相同．
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