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1. 列竖式计算，并验算带☆的题。
3.69 + 2.73 =
☆7.5 - 3.64 =
☆2.51 - 0.62 =
18 - 7.43 =
28.86 + 3.7 =
☆29.7 + 36.4 =
3.69 + 2.73 =
☆7.5 - 3.64 =
☆2.51 - 0.62 =
18 - 7.43 =
28.86 + 3.7 =
☆29.7 + 36.4 =
答案
6.42
3.86
1.89
10.57
32.56
66.1
2. 脱式计算。
38.6 + 1.28 + 2.64
5.7 - 1.26 - 3.03
17.8 + 0.42 - 4.81
9.56 - (12.08 - 4.36)
38.6 + 1.28 + 2.64
5.7 - 1.26 - 3.03
17.8 + 0.42 - 4.81
9.56 - (12.08 - 4.36)
答案
=39.88+2.64
=42.52
=4.44-3.03 =1.41
=18.22-4.81 =13.41
=9.56-7.72 =1.84
=4.44-3.03 =1.41
=18.22-4.81 =13.41
=9.56-7.72 =1.84
3. 计算下面各题，能简算的要简算。
5.85 + 1.89 + 2.15
24.8 + 14.6 + 15.4
15.4 - 0.82 + 1.67
6.3 - 1.73 - 0.27
3.68 + 1.35 + 6.32 + 0.65
8.65 - (3.56 + 1.8)
5.85 + 1.89 + 2.15
24.8 + 14.6 + 15.4
15.4 - 0.82 + 1.67
6.3 - 1.73 - 0.27
3.68 + 1.35 + 6.32 + 0.65
8.65 - (3.56 + 1.8)
答案
=5.85+2.15+1.89
=8+1.89
=9.89
=24.8+(14.6+15.4) =24.8+30 =54.8
=14.58+1.67 =16.25
=6.3-(1.73+0.27) =6.3-2 =4.3
=(3.68+6.32)+(1.35+0.65) =10+2 =12
=8.65-5.36 =3.29
=24.8+(14.6+15.4) =24.8+30 =54.8
=14.58+1.67 =16.25
=6.3-(1.73+0.27) =6.3-2 =4.3
=(3.68+6.32)+(1.35+0.65) =10+2 =12
=8.65-5.36 =3.29
