问题
解答题
计算下面各题,能简算的要简算.
|
答案
①
÷23+8 17
×1 23
,9 17
=
×8 17
+1 23
×1 23
,9 17
=(
+8 17
)×9 17
,1 23
=1×
,1 23
=
;1 23
②0.25×1.25×32,
=0.25×1.25×8×4,
=(0.25×4)×(1.25×8),
=1×10,
=10;
③3.6-2.8+7.4-7.2,
=3.6+7.4-(2.8+7.2),
=11-10,
=1;
④41×101,
=41×(100+1),
=41×100+41×1,
=4100+41,
=4141.