问题
填空题
计算:0.02+0.04+0.06+0.08+…+19.94+19.96+19.98=______.
答案
0.02+0.04+0.06+0.08+…+19.94+19.96+19.98,
=(0.02+19.98)×999÷2,
=20×999÷2,
=9990;
故答案为:9990.
计算:0.02+0.04+0.06+0.08+…+19.94+19.96+19.98=______.
0.02+0.04+0.06+0.08+…+19.94+19.96+19.98,
=(0.02+19.98)×999÷2,
=20×999÷2,
=9990;
故答案为:9990.