43*401
=(43*400)加1*43
=17200加43
=17243
运用了乘法解合律,
*是乘号。
43X401
=43X(400+1)
=43X400+43
=17200+43
=17243
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43x401
=43x(400+1) 乘法分配律
=43x400+43x1
=(40+3)x400+43 乘法分配律
=40x400+3x400+43
=16000+1200+43
=17243
43X401=43X(400+1)=43X400+43=1763