Required Mathematical Intelligence

Chapter 119 Clever Calculation

Chapter 119 Clever Calculation

(1)9÷1.3 1.3÷9 6÷1.3 1.4÷9 11÷1.3
(2)99999×77778 33333×66666
[答案:(1)20.3
(2)33333×3×77778 33333×22222×3
=33333×3×(77778 22222)

= 99999 x 100000
= 9999900000]
(End of this chapter)

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