登录
1. 直接写出得数。
730 - 650 =
16 × 5 =
140 × 7 =
11 × 9 × 2 =
81 - 36 =
600 × 8 =
55 × 2 =
13 × 7 × 5 =
700 × 7 =
80 - 46 =
9 × 900 =
2 × 23 × 3 =
5 × 6 =
56 + 29 =
201 × 4 =
15 × 7 × 4 =
8 × 20 =
6 × 20 =
3 × 320 =
80 - 51 + 19 =
3 × 400 =
65 × 2 =
74 - 28 =
240 - 40 × 5 =
46 + 34 =
702 × 9 ≈
906 × 8 ≈
35 × (20 - 14) =
92 - 59 =
488 × 6 ≈
599 × 3 ≈
(100 - 41) × 2 =
730 - 650 =
16 × 5 =
140 × 7 =
11 × 9 × 2 =
81 - 36 =
600 × 8 =
55 × 2 =
13 × 7 × 5 =
700 × 7 =
80 - 46 =
9 × 900 =
2 × 23 × 3 =
5 × 6 =
56 + 29 =
201 × 4 =
15 × 7 × 4 =
8 × 20 =
6 × 20 =
3 × 320 =
80 - 51 + 19 =
3 × 400 =
65 × 2 =
74 - 28 =
240 - 40 × 5 =
46 + 34 =
702 × 9 ≈
906 × 8 ≈
35 × (20 - 14) =
92 - 59 =
488 × 6 ≈
599 × 3 ≈
(100 - 41) × 2 =
答案
1. 80
80
980
198
45
4800
110
455
4900
34
8100
138
30
85
804
420
160
120
960
48
1200
130
46
40
80
6300
7200
210
33
3000
1800
118
80
980
198
45
4800
110
455
4900
34
8100
138
30
85
804
420
160
120
960
48
1200
130
46
40
80
6300
7200
210
33
3000
1800
118
2. 用竖式计算。
803×8=
546×8=
7×999=
803×8=
546×8=
7×999=
答案
2. 6424
4368
6993
（竖式略）
4368
6993
（竖式略）
3. 在(
6千克=(
8000克=(
9千克500克=(
7千克－2000克=(
3200克=(
7060克=(
5千克＋4克=(
1600克＋2400克=(
6000
)里填合适的数。6千克=(
6000
)克8000克=(
8
)千克9千克500克=(
9500
)克7千克－2000克=(
5000
)克3200克=(
3
)千克(200
)克7060克=(
7
)千克(60
)克5千克＋4克=(
5004
)克1600克＋2400克=(
4
)千克答案
3. 6000
3
200
8
7
60
9500
5004
5000
4
3
200
8
7
60
9500
5004
5000
4
一个草莓重20克。
苹果=（
菠萝=（
苹果=（
120
）克菠萝=（
600
）克答案
120
600
600
