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Mathematics in the second volume of Grade One —— How to calculate the square root and cube root quickly? Please answer quickly, there will be a monthly exam tomorrow! ! !
Method Skill: Remember the cubic table within 10 and the square table within 30. Square tables and cubic tables with tens and hundreds.
Such as: 0.216; ∵ 6? =2 16; ∴ cube root of 0.2 16 = 0.6;
The arithmetic square root of 1.44. ∵ ? 12? = 144,∴ ? The arithmetic square root of 1.44 = 1.2.