简便运算10.74×4.5-0.74×0.5×9= ?

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简便运算10.74×4.5-0.74×0.5×9= ?
简便运算10.74×4.5-0.74×0.5×9= ?

简便运算10.74×4.5-0.74×0.5×9= ?
10.74×4.5 - 0.74×0.5×9
= (10 + 0.74)×4.5 - 0.74×(0.5×9)
= 10×4.5 + 0.74×4.5 - 0.74×4.5
= 10×4.5
= 45

10.74×4.5-0.74×0.5×9
=10.74×4.5-0.74×(0.5×9)
=10.74×4.5-0.74×4.5
=4.5×(10.74-0.74)
=4.5×10
=45

44.955