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1. 直接写出得数。(40☆)
$3.5 + 6.4 = $
$100 - 91.6 = $
$9 - 0.89 = $
$13.8 - 7.1 = $
$2.1 + 0.29 = $
$2.13 - 0.02 = $
$0.3 + 0.75 = $
$3.6 + 1.6 = $
$0.75 × 10 = $
$7.5 - 0.47 = $
$3.5 + 6.4 = $
9.9
$3.7 - 0.9 = $2.8
$7.75 - 0.5 = $7.25
$1.4 + 0.6 - 1.45 = $0.55
$100 - 91.6 = $
8.4
$102 - 0.3 = $101.7
$7.05 - 0.05 = $7
$11 - 3.3 - 2.7 = $5
$9 - 0.89 = $
8.11
$102 + 0.3 = $102.3
$0.78 - 0.39 = $0.39
$3.2 + 2.8 + 4.3 = $10.3
$13.8 - 7.1 = $
6.7
$427 ÷ 10 = $42.7
$3.5 + 5.5 = $9
$3.5 - 0.8 + 0.2 = $2.9
$2.1 + 0.29 = $
2.39
$1.12 - 1.03 = $0.09
$5.5 - 3.9 = $1.6
$4.6 × 10 ÷ 100 = $0.46
$2.13 - 0.02 = $
2.11
$4.5 - 0.01 = $4.49
$3.8 - 0.9 = $2.9
$1.25 + 5.2 + 4.8 = $11.25
$0.3 + 0.75 = $
1.05
$3.51 + 0.2 = $3.71
$10 - 6.55 = $3.45
$3.5 + 7.8 - 6.3 = $5
$3.6 + 1.6 = $
5.2
$2.6 + 1.4 = $4
$3.21 + 16.8 = $20.01
$5.4 - 0.5 - 1.4 = $3.5
$0.75 × 10 = $
7.5
$1.9 + 0.85 = $2.75
$5.34 + 0.6 = $5.94
$3.5 + 2.7 + 0.6 = $6.8
$7.5 - 0.47 = $
7.03
$0.58 + 0.43 = $1.01
$7.05 - 5 = $2.05
$3.7 + 1.8 - 1.2 = $4.3
答案
9.9 2.8 7.25 0.55
8.4 101.7 7 5
8.11 102.3 0.39 10.3
6.7 42.7 9 2.9
2.39 0.09 1.6 0.46
2.11 4.49 2.9 11.25
1.05 3.71 3.45 5
5.2 4 20.01 3.5
7.5 2.75 5.94 6.8
7.03 1.01 2.05 4.3
8.4 101.7 7 5
8.11 102.3 0.39 10.3
6.7 42.7 9 2.9
2.39 0.09 1.6 0.46
2.11 4.49 2.9 11.25
1.05 3.71 3.45 5
5.2 4 20.01 3.5
7.5 2.75 5.94 6.8
7.03 1.01 2.05 4.3
2. 列竖式计算。(18☆)
$16.3 + 63.83 = $
$88.7 - 21.38 = $
$16.3 + 63.83 = $
80.13
$14.67 + 13.98 = $28.65
$9.25 + 12.5 = $21.75
$88.7 - 21.38 = $
67.32
$10.1 - 4.75 = $5.35
$30 - 18.76 = $11.24
答案
80.13 28.65 21.75
67.32 5.35 11.24
67.32 5.35 11.24
3. 计算下面各题,能简算的要简算。(18☆)
$35.37 + 6.49 + 3.51$ $150 - 25.38 - 74.62$ $56.1 - 15.46 - 26.1$
$3.75 + 1.46 + 1.25 + 0.54$ $7.37 - (3.88 + 2.37)$ $8.19 - 5.9 + 12.81 - 4.1$
$35.37 + 6.49 + 3.51$ $150 - 25.38 - 74.62$ $56.1 - 15.46 - 26.1$
$3.75 + 1.46 + 1.25 + 0.54$ $7.37 - (3.88 + 2.37)$ $8.19 - 5.9 + 12.81 - 4.1$
答案
45.37 50 14.54
7 1.12 11
7 1.12 11
