小乌龟绕水池边走一圈,走了多少米?
直接写出得数. 0.9+99×=4 ﹣(+)=5﹣1.4﹣1.6= 2﹣﹣=×2÷×2=(+)×12=
5.26×99+5.26+4.74×103﹣4.74×3.
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(1)1.3﹣3.79+9.7﹣6.21(2)3.64÷4+4.36×0.25 (3)÷(﹣)×(﹣)(4)9×4.25+4× (5)(﹣)×4×9(6)1+2+3+4+…+49+50.
36.3×5.5+6.37×55.