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估算或直接写得数32×98≈9800÷15≈598+204≈307+448≈(18+14)×4=34÷14=7.2÷0.4=19-19×19=6×16÷6×16=3.9×3=1-0.92=2+2%=

题目详情
估算或直接写得数
32×98≈
9800÷15≈ 598+204≈ 307+448≈
1
8
+
1
4
)×4=
3
4
÷
1
4
=
7.2÷0.4=
1
9
-
1
9
×
1
9
=
1
6
÷6×
1
6
=
3.9×3= 1-0.92= 2+2%=
▼优质解答
答案和解析
32×98≈3000; 9800÷15≈660; 598+204≈800; 307+448≈750;
1
8
+
1
4
)×4=1
1
2
3
4
÷
1
4
=3;
7.2÷0.4=18;
1
9
-
1
9
×
1
9
=
8
81
1
6
÷6×
1
6
=
1
36
3.9×3=11.7; 1-0.92=0.08; 2+2%=2.02.