比一比,算一算.、 57×100+57 29×200-29×2 57×101 29×198比一比,算一算.57×100+57 29×200-29×2 57×101 29×198

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比一比,算一算.、 57×100+57 29×200-29×2 57×101 29×198
比一比,算一算.57×100+57 29×200-29×2 57×101 29×198

57×100+57
=5700+57
=5757
29×200-29×2
=5800-58
=5742
57×101
=57*100+57
=5700+57
=5757
29×198
=29*200-29*2
=5800-58
=5742