问题
解答题
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答案
解①1÷(1+
=1÷ = ②5 =7 =7 ③2.8×5.6+3.4×2 =2.8×(5.6+3.4-1) =2.8×8 =22.4; ④2 =( =2×100 =200; ⑤[1-0.8÷( =1-0.8÷0.8 =1-1 =0; ⑥ = ⑦1÷[0.5×(2 =1÷[0.5×2.5-0.25] =1÷[1.25-0.25] =1÷1 =1; ⑧[4-(1 =[4- =[4- = = ⑨( = =54-49 =5; ⑩(4 =(4 =36× =3+0.2 =3.2. |