问题
解答题
计算下面各题,能简算的要简算. ①0.45+0.45÷0.9×1.8 ②9
③25×104 ④0.625×4.3+
⑤(
⑥
|
答案
①0.45+0.45÷0.9×1.8,
=0.45+0.5×1.8,
=0.45+0.9,
=1.35;
②9
-55 11
-2.25,3 4
=9
-(5.75+2.25),5 11
=9
-8,5 11
=1
;5 11
③25×104,
=25×100+25×4,
=2500+100,
=2600;
④0.625×4.3+
×4.7+62.5%,5 8
=0.625×(4.3+4.7+1),
=0.625×10,
=6.25;
⑤(
+1 10
)×10×6,1 6
=
×10×6+1 10
×10×6,1 6
=6+10,
=16;
⑥
×20-3 8
×3-3 8
,3 8
=
×(20-3-1),3 8
=
×16,3 8
=6.