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79十42十79十79x57用简便算法怎么算

题目有误, 应该是: 79×42+79+79×57用简便算法怎么算 79×42+79+79×57 =79×42+79×1+79×57 =(42+1+57)×79 =100×79 =7900

79×42+79+79×52 =79×42+79×1+79×52 =79×(42+1+52) =79×95 =79×(100-5) =79×100-79×5 =7900-395 =7505 望采纳,谢谢

=79×(42+1+57) =79×100=7900

960÷237x42十37x38 =(960/237) x42十37x38 =(4又4/79)x42十37x38 =(4+4/79)x42+1406 =168+168/79+1406 =168+2+10/79+1406 =1576又10/79

79十42÷7先算除法再算加法 =79+6 =85

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