题目

计算下面各题,能简算的要简算 ①4÷ - ÷4 ②48×( + - ) ③4 +8.27+4 +0.77 ④12- + ÷ ⑤3.68×[1÷(2 -2.09)] ⑥ 答案:解:①4÷ 25 - 25 ÷4 =10-110 =9910 ②48×( 16 + 14 - 512 ) =48×16+48×14-48×512 =8+12-20 =20-20 =0 ③4 27 +8.27+4 57 +0.77 =(427+457)+(8.27+0.77) =9+9.04 =18.04 ④12- 27 + 17 ÷ 15 =12+(57-27) =12+37 =1237 ⑤3.68×[1÷(2 110 -2.09)] =3.68×[1÷0.01] =3.68×100 =368 ⑥ 58×17÷9+3÷8×179 =(58+38)×179 =1×179 =179
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