1.竖式填空。
0.51 + 0.09 − 0.2 = 21.3 + 23.88 + 16.5 =

0.51 + 0.09 − 0.2 = 21.3 + 23.88 + 16.5 =
答案:
2.计算下面各题。
4.7 − 1.76 + 2.09
3.3 + 6.77 − 2.50
19.4 − 6.4 + 3.6
12.3 + 12 − 9.6
1.9 + 1.1 + 6.8
55 − 12.3 − 7.7
4.7 − 1.76 + 2.09
3.3 + 6.77 − 2.50
19.4 − 6.4 + 3.6
12.3 + 12 − 9.6
1.9 + 1.1 + 6.8
55 − 12.3 − 7.7
答案:
4.7 - 1.76 + 2.09 = 2.94 + 2.09 = 5.03
3.3 + 6.77 - 2.50 = 10.07 - 2.5 = 7.57
19.4 - 6.4 + 3.6 = 13 + 3.6 = 16.6
12.3 + 12 - 9.6 = 24.3 - 9.6 = 14.7
1.9 + 1.1 + 6.8 = 3 + 6.8 = 9.8
55 - 12.3 - 7.7 = 55 - (12.3 + 7.7) = 55 - 20 = 35
3.3 + 6.77 - 2.50 = 10.07 - 2.5 = 7.57
19.4 - 6.4 + 3.6 = 13 + 3.6 = 16.6
12.3 + 12 - 9.6 = 24.3 - 9.6 = 14.7
1.9 + 1.1 + 6.8 = 3 + 6.8 = 9.8
55 - 12.3 - 7.7 = 55 - (12.3 + 7.7) = 55 - 20 = 35
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