一、口算。（每题1分，共48分）
123 + 15 =
3.6 + 6.3 =
0 ÷ 6 =
310 × 70 =
160 + 70 =
6 - 1.2 =
256 + 30 =
210 × 80 =
56 + 64 =
100 × 32 =
13 + 29 =
350 × 30 =
110 × 70 =
450 × 9 =
35 + 65 =
87 × 300 =
200 - 90 =
6.6 + 3.3 =
100 × 4 =
420 × 10 =
75 + 35 =
180 - 20 =
98 - 79 =
45 × 500 =
40 × 22 =
70 - 35 =
23 + 37 =
620 × 30 =
57 + 43 =
90 - 49 =
120 - 5 =
327 + 68 =
76 + 34 =
40 × 8 =
840 ÷ 7 =
310 × 60 =
480 + 60 =
63 - 54 =
110 × 40 =
600 × 26 =
98 ÷ 2 =
72 - 26 =
43 - 32 =
200 × 32 =
3.4 - 1.7 =
3.2 + 4 =
410 × 40 =
600 × 18 =

123 + 15 = 138
3.6 + 6.3 = 9.9
0 ÷ 6 = 0
310 × 70 = 21700
160 + 70 = 230
6 - 1.2 = 4.8
256 + 30 = 286
210 × 80 = 16800
56 + 64 = 120
100 × 32 = 3200
13 + 29 = 42
350 × 30 = 10500
110 × 70 = 7700
450 × 9 = 4050
35 + 65 = 100
87 × 300 = 26100
200 - 90 = 110
6.6 + 3.3 = 9.9
100 × 4 = 400
420 × 10 = 4200
75 + 35 = 110
180 - 20 = 160
98 - 79 = 19
45 × 500 = 22500
40 × 22 = 880
70 - 35 = 35
23 + 37 = 60
620 × 30 = 18600
57 + 43 = 100
90 - 49 = 41
120 - 5 = 115
327 + 68 = 395
76 + 34 = 110
40 × 8 = 320
840 ÷ 7 = 120
310 × 60 = 18600
480 + 60 = 540
63 - 54 = 9
110 × 40 = 4400
600 × 26 = 15600
98 ÷ 2 = 49
72 - 26 = 46
43 - 32 = 11
200 × 32 = 6400
3.4 - 1.7 = 1.7
3.2 + 4 = 7.2
410 × 40 = 16400
600 × 18 = 10800

二、在○里填上“＞”“＜”或“=”。（每题1分，共6分）
20×120○20×130
250×4○24×50
120×40○80×60
110×40○400×10
205×15○150×20
546×23○23×456

1. 20×120 ＜ 20×130
2. 250×4 ＜ 24×50
3. 120×40 = 80×60
4. 110×40 ＞ 400×10
5. 205×15 ＞ 150×20
6. 546×23 ＞ 23×456

三、用竖式计算。(每题3分,共18分)
618×18=
423×80=
840×36=
424×18=
404×19=
780×65=

618×18=11124
423×80=33840
840×36=30240
424×18=7632
404×19=7676
780×65=50700