0.92*2.4-0.42*2.4简便的,要算式,

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0.92*2.4-0.42*2.4简便的,要算式,0.92*2.4-0.42*2.4简便的,要算式,0.92*2.4-0.42*2.4简便的,要算式,0.92*2.4-0.42*2.4=(0.92-0

0.92*2.4-0.42*2.4简便的,要算式,
0.92*2.4-0.42*2.4简便的,要算式,

0.92*2.4-0.42*2.4简便的,要算式,
0.92*2.4-0.42*2.4
=(0.92-0.42)*2.4
=0.5*2.4
=1.2