423×9/25×33/4− 24/5×0.423×125=_.
问题描述:
423×
×39 25
− 23 4
×0.423×125=______. 4 5
答
423×
×39 25
-23 4
×0.432×1254 5
=423×
×39 25
-23 4
×423×0.125;4 5
=(
×9 25
-15 4
×14 5
)×423;1 8
=(
−27 20
)×423;7 20
=1×423;
=423;
故答案为:423.