问题 解答题
脱式计算
(1)840÷6-16×8(2)180-(325-900÷5)
(3)(107-63)×(375÷15)(4)432-(56-64÷4)
(5)48-25.06+24.6(6)990÷[2×(17+28)].
答案

(1)840÷6-16×8

=140-128

=12;

(2)180-(325-900÷5)

=180-(325-180)

=180-145

=35;

(3)(107-63)×(375÷15)

=44×25

=1100;

(4)432-(56-64÷4)

=432-(56-16)

=432-40

=392;

(5)48-25.06+24.6

=22.94+24.6

=47.54;

(6)990÷[2×(17+28)]

=990÷[2×45]

=990÷90

=11.

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