题目内容

【题目】计算:

17.5+(3.75÷2.5)-6.4

18.3÷6.1+2.4×1.8

9.2+15.3×0.25-4.8×1.5

6.51+(4.23-1.78)÷0.5.

【答案】12.6;7.32;5.825;11.41

【解析】

17.5+(3.75÷2.5)-6.4

=17.5+1.5-6.4

=12.6

18.3÷6.1+2.4×1.8

=3+4.32

=7.32

9.2+15.3×0.25-4.8×1.5

=9.2+3.825-7.2

=13.025-7.2

=5.825

6.51+(4.23-1.78)÷0.5

=6.51+2.45÷0.5

=6.51+4.9

=11.41

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