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89x24十89x76怎么简算

89x24估算是90x24

76×(201–1)( 71–71)×189 139×(24+75)

89x124-89x24 =89x(124-24) =89x100 =8900 希望帮到你 望采纳 谢谢 加油

49X104≈(5096)53X89≈(4717 )78X38≈(2964)197X13≈(2561)88X31≈(2728)49X89≈(4361)519X17≈(8823)609X24≈(14616)709X6≈(4254)91X19≈(1729)208X11≈(2288)102X81≈(8262)29X49≈(1421)477X12≈(5724)799X19≈(15181)612X19≈...

89x5十11x5 =(89+11)x5 =100x5 =500 25x24 =25x(4x6) =(25x4)x6 =100x6 =600 44x25 =(11x4)x25 =11x(4x25) =11x100 =1100 125x16x2222 =125x(8x2)x2222 =(125x8)x(2x2222) =1000x4444 =4444000 25x32x125x17 =25x(4x8)x125x17 =(25x4)x(8x125)...

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