问题 解答题
脱式计算203-135÷9(15+20)×3
128+20×8(37-15)×(8+14)42+6×(12-4)
(124-85)×12÷26(75+240)÷(20-5)×275+360÷20-5.
答案

(1)128+20×8,

=128+160,

=288;

(2)203-135÷9,

=203-15,

=188;

(3)(15+20)×3,

=35×3,

=105;

(4)(124-85)×12÷26,

=39×12÷26,

=468÷26,

=18;

(5)(37-15)×(8+14),

=22×22,

=484;

(6)42+6×(12-4),

42+6×8,

=42+48,

=90;

(7)(75+240)÷(20-5)×2,

=315÷15×2,

=21×2,

=42;

(8)75+360÷20-5,

=75+18-5,

=93-5,

=88.

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