问题
填空题
530-0.229=______; 982-101×99=______.
答案
530•0.229
=530×(
)291 5
=529×5×(
)291 5
=(5×
)29×51 5
=129×5
=1×5
=5;
982-101×99
=982-(100+1)(100-1)
=982-1002+1
=(98+100)×(98-100)+1
=198×(-2)+1
=-395,
故答案为:5,-395.