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直接写得数38×3≈153×7≈289×4≈511×4≈509×8≈60×4≈500×7=73-37=73-58=999×0=40×5=38+15=81-65=46+29=600×5=24+14=27+57=59-39=1-16=56-56=

题目详情
直接写得数
38×3≈153×7≈289×4≈511×4≈
509×8≈60×4≈500×7=73-37=
73-58=999×0=40×5=38+15=
81-65=46+29=600×5=
2
4
+
1
4
=
 
2
7
+
5
7
=
5
9
-
3
9
=
1-
1
6
=
5
6
-
5
6
=
直接写得数
38×3≈153×7≈289×4≈511×4≈
509×8≈60×4≈500×7=73-37=
73-58=999×0=40×5=38+15=
81-65=46+29=600×5=
2
4
+
1
4
=
 
2
7
+
5
7
=
5
9
-
3
9
=
1-
1
6
=
5
6
-
5
6
=
38×3≈153×7≈289×4≈511×4≈
509×8≈60×4≈500×7=73-37=
73-58=999×0=40×5=38+15=
81-65=46+29=600×5=
2
4
+
1
4
=
 
2
7
+
5
7
=
5
9
-
3
9
=
1-
1
6
=
5
6
-
5
6
=
38×3≈153×7≈289×4≈511×4≈509×8≈60×4≈500×7=73-37=73-58=999×0=40×5=38+15=81-65=46+29=600×5=
2
4
+
1
4
=
 
2
7
+
5
7
=
5
9
-
3
9
=
1-
1
6
=
5
6
-
5
6
=
38×3≈153×7≈289×4≈511×4≈38×3≈153×7≈289×4≈511×4≈509×8≈60×4≈500×7=73-37=509×8≈60×4≈500×7=73-37=73-58=999×0=40×5=38+15=73-58=999×0=40×5=38+15=81-65=46+29=600×5=
2
4
+
1
4
=
81-65=46+29=600×5=
2
4
+
1
4
=
2
4
+
1
4
=
2
4
242244
1
4
=
1
4
141144 
2
7
+
5
7
=
5
9
-
3
9
=
1-
1
6
=
5
6
-
5
6
=
 
2
7
+
5
7
=
2
7
+
5
7
=
2
7
272277
5
7
=
5
7
575577
5
9
-
3
9
=
5
9
-
3
9
=
5
9
595599
3
9
=
3
9
3933991-
1
6
=
1
6
=
1
6
161166
5
6
-
5
6
=
5
6
-
5
6
=
5
6
565566
5
6
=
5
6
565566
▼优质解答
答案和解析
38×3≈120153×7≈1050289×4≈1200511×4≈2000509×8≈400060×4≈300500×7=350073-37=3673-58=15999×0=040×5=20038+15=5381-65=1646+29=75600×5=300024+14=34 27+57=159-39=291-16=5656-56=0