神机妙算:(怎样简便就怎样算)4+16÷ 4 5 5 14 ÷ 5 9 ×64-1
神机妙算:(怎样简便就怎样算)4+16÷45514÷59×64-159×[34-(716-14)]34×0.53+75%×1.4725×3.2×1.2530514÷151...
神机妙算:(怎样简便就怎样算)4+16÷ 4 5 5 14 ÷ 5 9 ×64-1 5 9 ×[ 3 4 -( 7 16 - 1 4 )] 3 4 ×0.53+75%×1.47 25×3.2×1.25 30 5 14 ÷ 15 14 .
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雪凛ddU
2014-10-23
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(1)4+16÷ , =4+16× , =4+20, =24;
(2) ÷ ×64-1, = × ×64-1, = -1, = ;
(3) ×[ -( - )], = ×[ + - ], = ×[1- ], = × , = ;
(4) ×0.53+75%×1.47, =0.75×0.53+0.75×1.47, =(0.53+1.47)×0.75, =2×0.75, =1.5;
(5)25×3.2×1.25, =25×0.4×8×1.25, =10×(8×1.25), =10×10, =100;
(6)30 ÷ , =(30+ )× , =30× + × , =28+ , =28 . |
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