问题 解答题
脱式计算.
(78+52)×(120÷60)
(128-72)×12÷48
80-(16.405+14.9)68.7-(44.6+0.375)
150×40×25×25625÷75+25×32.
答案

(1)(78+52)×(120÷60)

=130×2

=260;

(2)(128-72)×12÷48

=56×12÷48

=672÷48

=14;

(3)80-(16.405+14.9)

=80-31.305

=48.695;

(4)68.7-(44.6+0.375)

=68.7-44.975

=23.725;

(5)150×40×25×2

=(150×2)×(40×25)

=300×1000

=300000;

(6)5625÷75+25×32

=75+800

=875.

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