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脱式计算 (能简算的要简算). 72.8÷5.6+...

①72.8÷2.5÷4,=72.8÷(2.5×4),=72.8÷10,=7.28;②0.83×7.2+0.83×2.8,=0.83×(7.2+2.8)=0.83×10,=8.3;③18.305÷0.14-58.67,=130.75-58.67,=72.08;④7.8×9.9,=7.8×(10-0.1),=7.8×10-7.8×0.1,=78-0.78,=77.22.

14.9+72.8÷5.6 =14.9+13 =27.9

脱式计算 72÷8+32 =9+32 =41

32

8÷2.5等于8/2.5等于32/10=3.2,3.2-30.2=-27,72-27=45

(208+72÷8)*8 =208x8+72÷8x8 =208x8+72 =208x8+9x8 =8x(208+9) =8x(217) =8x200+8x10+8x7 =1600+80+56 =1736 朋友,请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果...

37.72÷(1+63.8%)×63.8% =37.72÷163.8%×63.8% ≈23.03×63.8% =14.69314

=72.8+5.4-8.6=78.2-8.6=78.2-8.2-0.4=69.6

72.8+3.4+27.2+6.6 =(72.8+27.2)+(3.4+6.6) =100+10 =110

340÷(8+72÷8) =340÷(8+9) =340÷17 =20

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