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直接写出得数(约等号的填估算值).2.8+0.12=2.5×0.4=9÷1.5=4000÷125÷8=14-15=10-23=56÷512=25×4÷25×4=9.19×9.8≈27.475÷3.14≈89÷2×0=23×4+23×2=

题目详情
直接写出得数(约等号的填估算值).
2.8+0.12=
2.5×0.4= 9÷1.5= 4000÷125÷8=
1
4
-
1
5
=
10-
2
3
=
5
6
÷
5
12
=
2
5
×4÷
2
5
×4=
9.19×9.8≈ 27.475÷3.14≈
8
9
÷2×0=
2
3
×4+
2
3
×2=
直接写出得数(约等号的填估算值).
2.8+0.12=
2.5×0.4= 9÷1.5= 4000÷125÷8=
1
4
-
1
5
=
10-
2
3
=
5
6
÷
5
12
=
2
5
×4÷
2
5
×4=
9.19×9.8≈ 27.475÷3.14≈
8
9
÷2×0=
2
3
×4+
2
3
×2=
直接写出得数(约等号的填估算值).
2.8+0.12= 2.5×0.4= 9÷1.5= 4000÷125÷8=
1
4
-
1
5
=
直接写出得数(约等号的填估算值).
2.8+0.12=
2.5×0.4=9÷1.5=4000÷125÷8=
1
4
-
1
5
=
1
4
-
1
5
=
1
4
1144
1
5
=
1
5
1155 10-
2
3
=
5
6
÷
5
12
=
2
5
×4÷
2
5
×4=
9.19×9.8≈ 27.475÷3.14≈10-
2
3
=
2
3
=
2
3
2233
5
6
÷
5
12
=
5
6
÷
5
12
=
5
6
5566
5
12
=
5
12
551212
2
5
×4÷
2
5
×4=
2
5
×4÷
2
5
×4=
2
5
2255
2
5
×4=
2
5
22559.19×9.8≈27.475÷3.14≈
8
9
÷2×0=
2
3
×4+
2
3
×2=
8
9
÷2×0=
8
9
÷2×0=
8
9
8899
2
3
×4+
2
3
×2=
2
3
×4+
2
3
×2=
2
3
2233
2
3
×2=
2
3
2233
▼优质解答
答案和解析
2.8+0.12=2.92, 2.5×0.4=1, 9÷1.5=6, 4000÷125÷8=4, 14-15=120, 10-23=913, 56÷512=2, 25×4÷25×4=16, 9.19×9.8≈90, 27.475÷3.14≈9, 89÷2×0=0, 23×4+23×2=4,...