1. 口算。(建议用时4分钟)
630 - 450 =
536 ÷ 8 =
960 ÷ 4 =
27 × 20 =
40 × 30 =
370 + 260 =
660 - 390 =
601 + 59 =
27 × 30 =
338 ÷ 2 =
234 ÷ 3 =
120 ÷ 8 =
420 ÷ 3 =
13 × 60 =
210 ÷ 7 =
190 ÷ 2 =
630 - 270 =
270 × 20 =
130 × 30 =
600 × 50 =
186 ÷ 3 =
26 × 20 =
550 - 260 =
201 × 40 =
630 - 450 =
536 ÷ 8 =
960 ÷ 4 =
27 × 20 =
40 × 30 =
370 + 260 =
660 - 390 =
601 + 59 =
27 × 30 =
338 ÷ 2 =
234 ÷ 3 =
120 ÷ 8 =
420 ÷ 3 =
13 × 60 =
210 ÷ 7 =
190 ÷ 2 =
630 - 270 =
270 × 20 =
130 × 30 =
600 × 50 =
186 ÷ 3 =
26 × 20 =
550 - 260 =
201 × 40 =
答案
1. 180
67
240
540
1200
630
270
660
810
169
78
15
140
780
30
95
360
5400
3900
30000
62
520
290
8040
67
240
540
1200
630
270
660
810
169
78
15
140
780
30
95
360
5400
3900
30000
62
520
290
8040
2. 用竖式计算。(建议用时4分钟)
64×280=
38×501=
489×60=
326×32=
39×465=
205×32=
64×280=
38×501=
489×60=
326×32=
39×465=
205×32=
答案
2. 17920
19038
29340
10432
18135
6560
19038
29340
10432
18135
6560
3. 解决问题。(建议用时2分钟)
先用计算器算出前三题的得数,再直接填出后面几题的得数。
$7×9=( )$
$97×99=( )$
$997×999=( )$
$9997×9999=( )$
$9999997×9999999=( )$
先用计算器算出前三题的得数,再直接填出后面几题的得数。
$7×9=( )$
$97×99=( )$
$997×999=( )$
$9997×9999=( )$
$9999997×9999999=( )$
答案
3. 63
9603
996003
99960003
99999960000003
9603
996003
99960003
99999960000003
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