问题 解答题
脱式计算.
180÷9-18(48+52)÷5100-25×420+80×37×(34+56)105×2×5.
答案

(1)180÷9-18,

=20-18,

=2;

(2)(48+52)÷5,

=100÷5,

=20;

(3)100-25×4,

=100-100,

=0;

(4)20+80×3,

=20+240,

=260;

(5)7×(34+56),

=7×90,

=630;

(6)105×2×5,

=105×(2×5),

=105×10,

=1050.

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