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1. 直接写出得数。
5.4 + 2 =
48 × 10 =
240 - 56 =
30.8 - 8.2 - 5.6 =
40 × 21 =
320 ÷ 4 =
360 ÷ 20 =
45 × 5 ÷ 3 =
330 ÷ 30 =
500 - 20 =
1.09 + 4.3 =
280 - (80 + 35) =
20 × 12 =
870 ÷ 30 =
99 + 199 =
25 × 16 × 2 =
76 - 49 =
58 + 102 =
506 ÷ 2 =
24 × 5 ÷ 2 =
120 ÷ 24 =
3.64 - 3.6 =
412 × 40 =
126 ÷ 6 × 5 =
750 ÷ 50 =
310 ÷ 5 =
740 ÷ 20 =
32 × 5 ÷ 32 × 5 =
5.4 + 2 =
48 × 10 =
240 - 56 =
30.8 - 8.2 - 5.6 =
40 × 21 =
320 ÷ 4 =
360 ÷ 20 =
45 × 5 ÷ 3 =
330 ÷ 30 =
500 - 20 =
1.09 + 4.3 =
280 - (80 + 35) =
20 × 12 =
870 ÷ 30 =
99 + 199 =
25 × 16 × 2 =
76 - 49 =
58 + 102 =
506 ÷ 2 =
24 × 5 ÷ 2 =
120 ÷ 24 =
3.64 - 3.6 =
412 × 40 =
126 ÷ 6 × 5 =
750 ÷ 50 =
310 ÷ 5 =
740 ÷ 20 =
32 × 5 ÷ 32 × 5 =
答案
1. 7.4
480
184
17
840
80
18
75
11
480
5.39
165
240
29
298
800
27
160
253
60
5
0.04
16480
105
15
62
37
25
480
184
17
840
80
18
75
11
480
5.39
165
240
29
298
800
27
160
253
60
5
0.04
16480
105
15
62
37
25
2. 计算下面各题，能简算的要简算。
65×12÷15×70
(236+45)×(96−78)
756÷[4×(56−35)]
2.15+5.17+3.62
187×15+187×5
357−64−57−36
65×12÷15×70
(236+45)×(96−78)
756÷[4×(56−35)]
2.15+5.17+3.62
187×15+187×5
357−64−57−36
答案
2. 3640
5058
9
10.94
3740
200
5058
9
10.94
3740
200
东东在计算7.6减一个一位小数时，把减号看成了加号，算出结果是12。你能帮他算出正确的结果吗？
答案
12−7.6=4.4
7.6−4.4=3.2
7.6−4.4=3.2
