4点52乘以1点25加4点48除以4/5减1又1/4道简便记算

4.52×1.25+4.48÷4/5-1又1/4
=4.52×5/4+4.48×5/4-5/4
=（4.52+4.48-1）×5/4
=8×5/4
=10

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