题目

脱式计算,能简算的要简算 (1) × ÷ × (2) 48×( ) (3) - ÷ (4) [ -( - )]÷ (5) ÷ + × (6) - - 答案: 解: 83×75÷83×75 = 5615÷83×75 = 75×75 = 4925 解:48×( 124+512+13 ) =48× 1924 =38 解: 12−425÷25 = 12 - 25 = 110 解:[ 12 -( 34 - 35 )]÷ 710 =[ 12 - 320 ]÷ 710 = 720 × 107 = 12 解: 79 ÷ 115 + 29 × 511 = 79 × 511 + 29 × 511 =( 79 + 29 )× 511 =1× 511 = 511 解: 98−57−27 = 98 -( 57+27 ) = 98 -1 = 18
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