簡算:1.8×(4-3.8)×5÷0.01 14.4÷【(3.94+0.86)×0.5】

簡算:1.8×(4-3.8)×5÷0.01 14.4÷【(3.94+0.86)×0.5】


1.8×(4-3.8)×5÷0.01
=1.8×0.2×5÷0.01
=1.8÷0.01x(0.2×5)
=180
14.4÷[(3.94+0.86)×0.5]
=14.4÷(4.8×0.5)
=14.4÷2.4
=6



0.86+8.6×9.9的簡算


0.86+8.6×9.9
=8.6x0.1+8.6x9.9
=8.6x(0.1+9.9)
=8.6x10
=86



(8.1-5.4)÷3.6+85.7簡算,
還有3.5-3.5x0.98


(8.1-5.4)÷3.6+85.7
=2.7÷3.6+85.7
=0.75+85.7
=86.45
3.5-3.5x0.98
=3.5x(1-0.98)
=3.5x0.02
=0.07



(3.6×1/2/5×4)÷(0.35×1.8×1/2)怎麼簡算?


(3.6×1/2/5×4)÷(0.35×1.8×1/2)
=(3.6×5/2×4)÷(0.35×0.9)
=(3.6×10)÷(0.35×0.9)
=(3.6×10×1000)÷(0.35×0.9×1000)
=(36×1000)/(35×9)
=800/7