如题所述
解:39×125等于( 4875 )
∵已知需求出39×125等于多少
A × (B - C)= A × B - A × C
∴39 × 125
= ( 40 - 1)× 125
= 40 × 125 - 1 × 125
= 5000 - 125
= 4875
答:39×125等于4875
∵已知需求出39×125等于多少
A × (B - C)= A × B - A × C
∴39 × 125
= ( 40 - 1)× 125
= 40 × 125 - 1 × 125
= 5000 - 125
= 4875
答:39×125等于4875
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第1个回答 2020-02-02
39×125
=(40-1)×125
=40×125-1×125
=5×8×125-125
=5000-125
=4875
=(40-1)×125
=40×125-1×125
=5×8×125-125
=5000-125
=4875
第2个回答 2020-02-02
39×125
=(40-1)×125
=40×125-1×125
=5000-125
=5875
=(40-1)×125
=40×125-1×125
=5000-125
=5875