1.用竖式计算。
62.78+28.84= 44.70+19.03= 0.59+0.7=
62.78+28.84= 44.70+19.03= 0.59+0.7=
答案:
2.计算下面各题。
5.27+17.53+1.91 32.01+2.7+10.23
56−15.45+7.45 1.57+0.77+13.23
97.4+(13.6−5.09) 70.12−(4.12+11.8)
5.27+17.53+1.91 32.01+2.7+10.23
56−15.45+7.45 1.57+0.77+13.23
97.4+(13.6−5.09) 70.12−(4.12+11.8)
答案:
5.27 + 17.53 + 1.91 = 22.8 + 1.91 = 24.71
32.01 + 2.7 + 10.23 = 34.71 + 10.23 = 44.94
56 - 15.45 + 7.45 = 56 - (15.45 - 7.45)= 56 - 8 = 48
1.57 + 0.77 + 13.23 = 1.57 + (0.77 + 13.23)= 1.57 + 14 = 15.57
97.4 + (13.6 - 5.09)= 97.4 + 13.6 - 5.09 = 111 - 5.09 = 105.91
70.12 - (4.12 + 11.8)= 70.12 - 4.12 - 11.8 = 66 - 11.8 = 54.2
32.01 + 2.7 + 10.23 = 34.71 + 10.23 = 44.94
56 - 15.45 + 7.45 = 56 - (15.45 - 7.45)= 56 - 8 = 48
1.57 + 0.77 + 13.23 = 1.57 + (0.77 + 13.23)= 1.57 + 14 = 15.57
97.4 + (13.6 - 5.09)= 97.4 + 13.6 - 5.09 = 111 - 5.09 = 105.91
70.12 - (4.12 + 11.8)= 70.12 - 4.12 - 11.8 = 66 - 11.8 = 54.2
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