1. 口算。
$4.25 - 2.57 =$ $6.8 - 2.7 =$ $0.42 + 0.67 =$
$1.7 - 1.2 =$ $2.5 + 3.3 =$ $4.7 + 2.8 =$
$4.25 - 2.57 =$ $6.8 - 2.7 =$ $0.42 + 0.67 =$
$1.7 - 1.2 =$ $2.5 + 3.3 =$ $4.7 + 2.8 =$
答案:
略
2. 列竖式计算,并验算。
$9.67 + 17.48 =$ $98.94 - 4.78 =$
验算: 验算:
$7.07 - 5.44 =$ $10.4 + 0.5 =$
验算: 验算:
$9.67 + 17.48 =$ $98.94 - 4.78 =$
验算: 验算:
$7.07 - 5.44 =$ $10.4 + 0.5 =$
验算: 验算:
答案:
(验算略)27.15@@94.16@@1.63@@10.9
3. 送小动物回家。(连一连)

答案:

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