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1. 直接写出得数。
47 + 16 =
108 + 84 =
231 - 47 =
93 - 27 - 33 =
100 - 21 =
346 - 27 =
50×30 =
18×30×2 =
15×3 =
110×8 =
600÷40 =
55×6÷30 =
85÷5 =
75÷15 =
38×20 =
80÷5÷4 =
6×80 =
380÷20 =
480÷24 =
52 - 144÷12 =
70×30 =
105×4 =
46×50 =
8×25÷50 =
11×30 =
1006÷2 =
760÷40 =
125×(8×4) =
400÷100 =
50×12 =
48×5 =
648 - 48×10 =
47 + 16 =
63
108 + 84 =
192
231 - 47 =
184
93 - 27 - 33 =
33
100 - 21 =
79
346 - 27 =
319
50×30 =
1500
18×30×2 =
1080
15×3 =
45
110×8 =
880
600÷40 =
15
55×6÷30 =
11
85÷5 =
17
75÷15 =
5
38×20 =
760
80÷5÷4 =
4
6×80 =
480
380÷20 =
19
480÷24 =
20
52 - 144÷12 =
40
70×30 =
2100
105×4 =
420
46×50 =
2300
8×25÷50 =
4
11×30 =
330
1006÷2 =
503
760÷40 =
19
125×(8×4) =
4000
400÷100 =
4
50×12 =
600
48×5 =
240
648 - 48×10 =
168
答案
1. 63 192 184 33 79 319 1500 1080 45 880 15 11 17 5 760 4 480 19 20 40 2100 420 2300 4 330 503 19 4000 4 600 240 168
2. 用竖式计算。
47×94 =
272÷8 =
586÷73 =
320×75 =
128×23 =
850÷28 =
47×94 =
4418
272÷8 =
34
586÷73 =
8……2
320×75 =
24000
128×23 =
2944
850÷28 =
30……10
竖式略答案
2. 4418 34 8……2 24000 2944 30……10 竖式略
解析
```
47
×94
----
188
423
----
4418
34
8)272
24
----
32
32
----
0
8
73)586
584
----
2
320
×75
----
1600
2240
----
24000
128
×23
----
384
256
----
2944
30
28)850
84
----
10
```
47
×94
----
188
423
----
4418
34
8)272
24
----
32
32
----
0
8
73)586
584
----
2
320
×75
----
1600
2240
----
24000
128
×23
----
384
256
----
2944
30
28)850
84
----
10
```
亮亮写了一个自然数,点点在这个数的末尾添上一个“0”,得到的数比原数大 72。把亮亮写的数改写成计数单位是 0.001 的数是多少？
答案
72÷(10-1)=8 8=8.000
