脱式计算 460+540÷20×5 98.7×0.9+9.

2024-11-16 04:50:18
推荐回答(2个)
回答1:

(1)460+540÷20×5
=460+27×5,
=460+135,
=595;

(2)98.7×0.9+9.87
=98.7×(1-0.1)+9.87,
=98.7×1-98.7×0.1+98.7,
=98.7×2-9.87,
=197.4-9.87,
=187.53;

(3)(11÷46+18÷23)×92
=(

11
46
+
18
23
)×92,
=
11
46
×92+
18
23
×92,
=22+72,
=94;

(4)1
3
4
×[(2.25+5
9
20
)÷77%]?10

=1.75×[(2.25+5.45)÷0.77]-10,
=1.75×[7.7÷0.77]-10,
=1.75×10-10,
=17.5-10,
=7.5.

回答2:

我不会~~~但还是要微笑~~~:)