括号5.3乘3.75加3.75乘3.5括号再除以2.2

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括号5.3乘3.75加3.75乘3.5括号再除以2.2括号5.3乘3.75加3.75乘3.5括号再除以2.2括号5.3乘3.75加3.75乘3.5括号再除以2.2(5.3×3.75+3.75×3.5)

括号5.3乘3.75加3.75乘3.5括号再除以2.2
括号5.3乘3.75加3.75乘3.5括号再除以2.2

括号5.3乘3.75加3.75乘3.5括号再除以2.2
(5.3×3.75+3.75×3.5)÷2.2
=(5.3+3.5)×3.75÷2.2
=8.8×3.75÷2.2
=8.8÷2.2×3.75
=4×3.75
=15

(5.3×3.75+3.75×3.5)÷2.2
=[(5.3+3.5)×3.75]÷2.2
=8.8×3.75÷2.2
=8.8÷2.2×15/4
=4×15/4
=15

=3.75×(5.3+3.5)÷2.2=3.75×4=15

答案是21.8625

(5.3*3.75+3.75*3.5)/2.2=3.75*(5.3+3.5)/2.2=3.75*4=15