=84*72=84*9*8=756*8=6048
84×8+64×84
=84×(8+64)
=84×72
=84×(80-8)
=84×80-84×8
=6720-672
=6048
84✘8+64✘84
=84✘(8+64)
=84✘72
=84✘72
=6048
解:84✘8+64✘84等于( 6048 )
∵已知需求出84✘8+64✘84等于多少
A × B + A × C = A × (B + C)
∴84 ✘ 8 + 64 ✘ 84
= 84 × (8 + 64)
= 84 × 72
= 84 × (70 + 2)
= 84 × 70 + 84 × 2
= 5880 + 168
= 6048
答:84✘8+64✘84等于6048