计算下列各题,能简算的要简算(1)91100×17+9100÷7+17(2)3-78÷(14+25%)]÷18(3)445÷4+525×14+0.25(4)15÷[815×(56+23)+112].
计算下列各题,能简算的要简算
(1)×+÷7+
(2)3-÷(+25%)]÷
(3)4÷4+5×+0.25
(4)15÷[×(+)+1].
答案和解析
(1)
×+÷7+,
=×+×+,
=(++1)×,
=2×,
=;
(2)[3-÷(+25%)]÷,
=[3-÷]÷,
=[3-]÷,
=1÷,
=10;
(3)4÷4+5×+0.25,
=4×+5×+,
=(4+5+1)×,
=11×,
=;
(4)15÷[×(+)+1],
=15÷[×+1],
=15÷[+1],
=15÷,
=.
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