问题
填空题
8.02+3.6+0.98+6.4=(8.02+0.98)+(3.6+6.4)应用了加法的______律和______律.
答案
8.02+3.6+0.98+6.4,
=(8.02+0.98)+(3.6+6.4),
=9+10,
=19.
故答案为:交换、结合.
8.02+3.6+0.98+6.4=(8.02+0.98)+(3.6+6.4)应用了加法的______律和______律.
8.02+3.6+0.98+6.4,
=(8.02+0.98)+(3.6+6.4),
=9+10,
=19.
故答案为:交换、结合.