2. 在里填上“>”“<”或“=”。(12 分)
8 + 815 66 + 0
10 个一2 个十 212
8 + 511 10 个一1 个十
10 - 22 + 6 16 - 47 + 6
7 + 417 - 4 8 - 3 - 410 - 10
8 + 77 + 4 + 6 9 - 6 + 76 + 7
8 + 815 66 + 0
10 个一2 个十 212
8 + 511 10 个一1 个十
10 - 22 + 6 16 - 47 + 6
7 + 417 - 4 8 - 3 - 410 - 10
8 + 77 + 4 + 6 9 - 6 + 76 + 7
答案
8+8>15
6=6+0
10个一<2个十
2<12
8+5>11
10个一=1个十
10-2=2+6
16-4<7+6
7+4<17-4
8-3-4=10-10
8+7<7+4+6
9-6+7<6+7
6=6+0
10个一<2个十
2<12
8+5>11
10个一=1个十
10-2=2+6
16-4<7+6
7+4<17-4
8-3-4=10-10
8+7<7+4+6
9-6+7<6+7
3. ()里要填几?(6 分)
5 + () = 8 () - 2 = 10
5 + () = 11 7 + () = 15
18 - () = 14 () - 7 = 10
5 + () = 8 () - 2 = 10
5 + () = 11 7 + () = 15
18 - () = 14 () - 7 = 10
答案
3.
5 + (3) = 8;
(12) - 2 = 10;
5 + (6) = 11;
7 + (8) = 15;
18 - (4) = 14;
(17) - 7 = 10。
5 + (3) = 8;
(12) - 2 = 10;
5 + (6) = 11;
7 + (8) = 15;
18 - (4) = 14;
(17) - 7 = 10。
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