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2.85×4.7列竖式计算

如图

0.98 × 4.7 = 4.606

3.15÷4.7≈0.67 仅供参考

(1)7.4+12.86=20.26; (2)20-5.674=14.326; (3)141.2-48.98=92.22; (4)102+4.36=106.36; (5)32.15-27.45=4.7; 验算: (6)12.9+5.01=17.91; 验算:

(1)30.5-1.8=28.7;30.5-1.8 . 28.7 验算:28.7+1.8 . 30.5 (2)0.49+4.7=5.19.0.49+4.7 . 5.19 验算:5.19-4.7 . 0.49

4.7 + 7.6 +5.3+2.31 = 12.3++5.3+2.31 = 17.6+2.31 =19.91 竖式见图:

=4.7/2.8=47/28约等于1.68倍

3.15÷4.7≈0.67

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