80道简便计算要列式 20
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1.25
×(
8+10
)
=1.25
×
8+1.25
×
10
=10+12.5=22.5
9123-
(
123+8.8
)
=9123-123-8.8
=9000-8.8
=8991.2
1.24
×
8.3+8.3
×
1.76
=8.3
×(
1.24+1.76)
=8.3
×
3=24.9
9999
×
1001
=9999
×(
1000+1
)
=9999
×
1000+9999
×
1
=10008999
14.8
×
6.3-6.3
×
6.5
+
8.3
×
3.7
=
(
14.8-6.5
)×
6.3
+
8.3
×
3.7
=8.3
×
6.3+8.3
×
3.7
8.3
×(
6.3
+
3.7
)
=8.3
×
10
=83
1.24+0.78+8.76
=
(
1.24+8.76
)
+0.78
=10+0.
×(
8+10
)
=1.25
×
8+1.25
×
10
=10+12.5=22.5
9123-
(
123+8.8
)
=9123-123-8.8
=9000-8.8
=8991.2
1.24
×
8.3+8.3
×
1.76
=8.3
×(
1.24+1.76)
=8.3
×
3=24.9
9999
×
1001
=9999
×(
1000+1
)
=9999
×
1000+9999
×
1
=10008999
14.8
×
6.3-6.3
×
6.5
+
8.3
×
3.7
=
(
14.8-6.5
)×
6.3
+
8.3
×
3.7
=8.3
×
6.3+8.3
×
3.7
8.3
×(
6.3
+
3.7
)
=8.3
×
10
=83
1.24+0.78+8.76
=
(
1.24+8.76
)
+0.78
=10+0.
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