题目

能简算的就简算. (1) × ÷ × (2) 24×( + ﹣ ) (3) ×25%+75%÷ (4) 4﹣ ÷ ﹣ 答案: 34 × 15 ÷ 34 × 15 = 34 × 15 × 43 × 15 =( 34 × 43 )×( 15 × 15 ) =1× 125 = 125 24×( 16 + 14 ﹣ 13 ) =24× 16 +24× 14 ﹣24× 13 =4+6﹣8 =10﹣8 =2 38 ×25%+75%÷ 83 = 38 ×25%+75%× 38 = 38 ×(25%+75%) = 38 ×1 = 38 4﹣ 25 ÷ 815 ﹣ 14 =4﹣ 34 ﹣ 14 =4﹣( 34 + 14 ) =4﹣1 =3
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