一、直接写出得数。(每题1分,共32分)
500 + 70 = 110 - 10 = 990 - 90 = 300 + 5000 =
900 - 700 = 250 - 50 = 8000 - 7000 = 7000 - 4000 =
320 - 20 = 430 - 30 = 780 - 80 = 8000 - 1000 =
8600 - 600 = 4000 + 300 = 200 + 500 = 9000 - 5000 =
600 + 30 = 70 + 600 = 360 - 60 = 4300 - 4000 =
8000 + 100 = 460 - 400 = 1000 + 300 = 7000 - 2000 =
9300 - 300 = 760 - 60 = 2000 + 600 = 3000 + 6000 =
490 - 90 = 500 + 20 = 4000 - 2000 = 6000 + 400 =
500 + 70 = 110 - 10 = 990 - 90 = 300 + 5000 =
900 - 700 = 250 - 50 = 8000 - 7000 = 7000 - 4000 =
320 - 20 = 430 - 30 = 780 - 80 = 8000 - 1000 =
8600 - 600 = 4000 + 300 = 200 + 500 = 9000 - 5000 =
600 + 30 = 70 + 600 = 360 - 60 = 4300 - 4000 =
8000 + 100 = 460 - 400 = 1000 + 300 = 7000 - 2000 =
9300 - 300 = 760 - 60 = 2000 + 600 = 3000 + 6000 =
490 - 90 = 500 + 20 = 4000 - 2000 = 6000 + 400 =
答案
一 570 100 900 5300 200 200 1000 3000 300 400 700 7000 8000 4300 700 4000 630 670 300 300 8100 60 1300 5000 9000 700 2600 9000 400 520 2000 6400
二、在〇里填“>”或“<”。(每题1分,共12分)
765〇1030 2783〇3278 9030〇8975 5840〇5484
8527〇8275 1204〇1201 4888〇8404 6090〇6088
1010〇1002 8008〇8070 6440〇6439 1997〇2025
765〇1030 2783〇3278 9030〇8975 5840〇5484
8527〇8275 1204〇1201 4888〇8404 6090〇6088
1010〇1002 8008〇8070 6440〇6439 1997〇2025
答案
二 < < > > > > < > > < > <
三、写出下面各数约等于几百或几千。(每题1分,共16分)
1990≈ 4012≈ 5024≈ 960≈
3926≈ 5943≈ 789≈ 4122≈
7988≈ 8106≈ 6877≈ 2099≈
7191≈ 8869≈ 3018≈ 1097≈
1990≈ 4012≈ 5024≈ 960≈
3926≈ 5943≈ 789≈ 4122≈
7988≈ 8106≈ 6877≈ 2099≈
7191≈ 8869≈ 3018≈ 1097≈
答案
三 2000 4000 5000 1000 4000 6000 800 4000 8000 8000 7000 2000 7000 9000 3000 1000
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