48乘以0.69+3.1乘以4.8怎样简便算

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48乘以0.69+3.1乘以4.8怎样简便算
48乘以0.69+3.1乘以4.8怎样简便算

48乘以0.69+3.1乘以4.8怎样简便算
48乘以0.69+3.1乘以4.8
=4.8乘以6.9+3.1乘以4.8
=48乘以(6.9+3.1)
=48乘以10
=480

48×0.69+3.1×4.8
=(48÷10)×(0.69×10)+3.1×4.8
=4.8×6.9+3.1×4.8
=4.8×(6.9+3.1)
=4.8×10
=48

48×0.69+3.1×4.8
=4.8×6.9+3.1×4.8
=4.8×(6.9+3.1)
=4.8×10
=48

=4.8*6.9+3.1*4.8
=4.8*(3.1+6.9)
=4.8*10
=48