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题型:单选题 题类:常考题 难易度:普通
(解析完整) 整数、小数四则混合运算6247
×4.5-3.5×7.6=( )
3.5×103
=3.5×100+3
=350+3
=353
4.26+4.26×99
19.97-(7.06+5.97)-2.94 2.5×12.5×1.6
27.3÷0.75÷4+1.9 4.9×7.2+61×0.72-7.2
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