问题
解答题
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答案
(1)2.25×5.8+2.75×5.8
=(2.25+2.75)×5.8
=5×5.8
=29;
(2)4×5.84×38×25
=5.84×(4×25)×38
=5.84×100×38
=22192;
(3)13.52-4.7-5.3+6.48
=13.52+6.48-(4.7+5.3)
=20-10
=10;
(4)22.5-4.5÷18
=22.5-4.5÷(9×2)
=22.5-4.5÷9÷2
=22.5-0.5÷2
=22.5-0.25
=22.25.