题目

脱式计算 (能简算的要简算) ① ② ③ = ④ = ⑤ = ⑥ = 答案：解：① 1516÷56×49 =98×49 =12 ② 58÷(58−12) =58÷18 =5 ③ 919×20 =919×（19+1） =919×19+919×1 =9+919 =9919 ④ (59+38)×7.2 =59×7.2+38×7.2 =4+2.7 =6.7 ⑤ 513÷94+813×49 =513×49+813×49 =（513+813）×49 =49 ⑥ (0.75−516)÷(29+23) =716×98 =63128

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