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306x24简便计算列脱式计算.

326×24 =325×24+24 =﹙200+125﹚×8×3+24 =4800+3000+24 =7824

125x30x24 =125x30x(8*3) =125*8*3*30 =1000*90 =90000

=387(24+75+1) =387*100 =38700

方法一: 解:24x24/25 =(25-1)x24/25……把24转化成25-1 =25x24/25-1x24/25……运用乘法分配率 =24-24/25 =23又1/25 方法二: 解:24x24/25 =24x(1-1/25)……把24/25转化成1-1/25 =24x1-24x1/25……运用乘法分配律 =24-24/25 =23又1/25

原式=576÷12一15X24÷12 =48一15X2 =48一30 =18

50-50×24÷80 =50-1200÷80 =50-15 =35

864一12x24 =864-288 =576

50-50x24÷80 =50-1200÷80 =50-15 =35

99x24/25 =(100-1)×24/25 =100×24/25-24/25 =96-24/25 =95又1/25

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

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