问题
解答题
|
答案
①36×101,
=36×(100+1),
=36×100+36×1,
=3600+36,
=3636;
②239×7.2+956×8.2,
=239×7.2+239×32.8,
=239+(7.2+32.8),
=239×40,
=9560;
③24×(
+1 4
+1 6
),1 12
=24×
+24×1 4
+24×1 6
,1 12
=6+4+2,
=12;
④3.7×0.58+6.3×0.58.
=(3.7+6.3)×0.58,
=10×0.58,
=5.8.