1. 直接写出得数。
2000 + 7000 = 5000 + 700 = 6800 - 6000 = 2500 - 500 =
4000 + 800 = 1500 - 500 = 600 + 7000 = 6000 + 600 =
600 + 30 = 380 - 80 = 400 + 5000 = 9000 + 900 =
800 + 60 = 200 + 9000 = 7600 - 7000 = 7100 - 100 =
3000 + 500 = 700 + 2000 = 800 + 20 = 6900 - 900 =
3700 - 700 = 3400 - 400 = 500 + 7000 = 50 + 500 =
4300 - 300 = 1000 + 400 = 130 - 30 = 2600 - 2000 =
800 + 1000 = 5300 - 5000 = 360 - 60 = 470 - 400 =
2000 + 7000 = 5000 + 700 = 6800 - 6000 = 2500 - 500 =
4000 + 800 = 1500 - 500 = 600 + 7000 = 6000 + 600 =
600 + 30 = 380 - 80 = 400 + 5000 = 9000 + 900 =
800 + 60 = 200 + 9000 = 7600 - 7000 = 7100 - 100 =
3000 + 500 = 700 + 2000 = 800 + 20 = 6900 - 900 =
3700 - 700 = 3400 - 400 = 500 + 7000 = 50 + 500 =
4300 - 300 = 1000 + 400 = 130 - 30 = 2600 - 2000 =
800 + 1000 = 5300 - 5000 = 360 - 60 = 470 - 400 =
答案
1. 9000 5700 800 2000
4800 1000 7600 6600
630 300 5400 9900
860 9200 600 7000
3500 2700 820 6000
3000 3000 7500 550
4000 1400 100 600
1800 300 300 70
4800 1000 7600 6600
630 300 5400 9900
860 9200 600 7000
3500 2700 820 6000
3000 3000 7500 550
4000 1400 100 600
1800 300 300 70
2. 在(
4001 =(
5070 =(
6800 =(
9646 =(
4000
)里填合适的数。4001 =(
4000
)+(1
) 7650 =(7000
)+(600
)+(50
)5070 =(
5000
)+(70
) 2043 =(2000
)+(40
)+(3
)6800 =(
6000
)+(800
) 3909 =(3000
)+(900
)+(9
)9646 =(
9000
)+(600
)+(40
)+(6
)答案
2. 4000 1 7000 600
50 5000 70 2000
40 3 6000 800
3000 900 9 9000
600 40 6
50 5000 70 2000
40 3 6000 800
3000 900 9 9000
600 40 6
3. 在$◯$里填“$>$”或“$<$”。
999$◯$1000 230$◯$320 722$◯$720
1819$◯$1689 3624$◯$2980 1209$◯$1210
3890$◯$3888 6100$◯$6010 7445$◯$8050
999$◯$1000 230$◯$320 722$◯$720
1819$◯$1689 3624$◯$2980 1209$◯$1210
3890$◯$3888 6100$◯$6010 7445$◯$8050
答案
3. < < >
> > <
> > <
> > <
> > <
在古代,人们会用算筹记数,如704表示成“
”,则“
”表示的是( )。(0用空格表示)
答案
思维提升
820
820
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