数学版五年级第二册数学课通答?
答案
7.方框1050cm2正方形864m2箱812dm2
8.3×3×5=45(dm2)
9.1.2×1.2×6×1.5=12.96(dm2)
10.50°2=25(米)
 ; ;50×25+50×2.5×2+25×2.5×2=1625(m2)
11.(8×6+8×3×2+6×3×21.4)×4=482.4(元)
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数学版五年级第二册数学课通答?
答案
7.方框1050cm2正方形864m2箱812dm2
8.3×3×5=45(dm2)
9.1.2×1.2×6×1.5=12.96(dm2)
10.50°2=25(米)
 ; ;50×25+50×2.5×2+25×2.5×2=1625(m2)
11.(8×6+8×3×2+6×3×21.4)×4=482.4(元)