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简便计算题大全四年级198/23

198÷23=8…14 验算 23×8+4 =184+14 =198 这个不能简算

198x23 =(200-2)x23 =200x23-2x23 =4600-46 =4554

198╳23 =(200-2)╳23 =200╳23-2╳23 =4600-46 =4554 ;;;

198×23 =(100+90+8)×23 =100×23+90×23+8×23 =2300+2070+184 =4370+184 =4550

198÷23 =(23×8+4)×23分之1 =23×8×23分之1+4×23分之1 =8+23分之4 =8又23分之4

198x36 =(200-2)x36 =200x36-2x36 =7200-72 =7128

原式等于 (200-2)×23.5 =200×23.5-2×23.5 =4700-47 =4653 所以原式的结果为4653.

198 × 23 = 4554 竖式见图:

g

等于66/19 23/19(23/198/3) =(23*198)/(19*23*3) =198/(19*3) =66/19

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