第1个回答 2019-10-06
这个题目有公因式4.5,故可以将45和0.45凑成4.5来计算,
4.5x37.5+45x3.05+0.45x3.2
=4.5x37.5+4.5x10x3.05+4.5÷10x3.2
=4.5x(37.5+30.5+0.32)
=4.5x68.32
=3074.4
第2个回答 2019-10-06
4.5X37.5 +45X3.05 +0.45X320
=4.5X37.5 +4.5X30.5 +4.5X320
=4.5x(37.5+30.5+32)
=4.5x100
=450
第3个回答 2019-10-06
4.5×37.5+45×3.05+0.45×3.2
=4.5×37.5+4.5×30.5+4.5×0.32
=4.5×(37.5+30.5)+4.5×4×0.08
=4.5×68+18×0.08
=4.5×(70-2)+1.44
=4.5×70-4.5×2+1.44
=315-9+1.44
=306+1.44
=307.44
第4个回答 2019-10-06
4.5×37.5+45×3.05+0.45×3.2
=4.5×37.5+4.5×30.5+4.5×0.32
=4.5×(37.5+30.5+0.32)
=4.5×68.32
=307.35