问题描述:
10.32-1.98= 3.25+1.98=
最佳答案:
①解法一:
10.32-1.98
=10.32-(2-0.02)
=10.32-2+0.02
=8.32+0.02
=8.34
解法二:
10.32-1.98
=10.32+0.02-0.02-1.98
=10.34-2
=8.34
②解法一:
3.25+1.98
=3.25+1.75+0.23
=5+0.23
= 5.23
解法二:
3.25+1.98
=3.25-0.02+0.02+1.98
=3.23+2
=5.23