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①1114×719-719×214+719②1983×668+6483×666③0.25×32×0.125 ④16+112+120+130+142+156+172+190+1110.

编辑:chaxungu时间:2026-04-27 13:18:58分类:小学数学题库

①11
1
4
×7
1
9
-7
1
9
×2
1
4
+7
1
9

②
19
83
×668+
64
83
×666
③0.25×32×0.125
④
1
6
+
1
12
+
1
20
+
1
30
+
1
42
+
1
56
+
1
72
+
1
90
+
1
110
.
①11
1
4
×7
1
9
-7
1
9
×2
1
4
+7
1
9
,
=(11
1
4
-2
1
4
+1)×7
1
9
,
=10×7
1
9
,
=10×(7+
1
9
),
=10×7+10×
1
9
,
=70+1
1
9
,
=71
1
9
;

②
19
83
×668+
64
83
×666,
=
19
83
×(666+2)+
64
83
×666,
=
19
83
×666+
19
83
×2+
64
83
×666,
=(
19
83
+
64
83
)×666+
19
83
×2,
=1×666+
38
83
,
=666
38
83
,

③0.25×32×0.125,
=0.25×(4×8)×0.125,
=(0.25×4)×(8×0.125),
=1×1,
=1;

④
1
6
+
1
12
+
1
20
+
1
30
+
1
42
+
1
56
+
1
72
+
1
90
+
1
110
,
=
1
2×3
+
1
3×4
+
1
4×5
+
1
5×6
+
1
6×7
+
1
7×8
+
1
8×9
+
1
9×10
+
1
10×11
,
=
1
2
-
1
3
+
1
3
-
1
4
+
1
4
-
1
5
+
1
5
-
1
6
+
1
6
-
1
7
+
1
7
-
1
8
+
1
8
-
1
9
+
1
9
-
1
10
+
1
10
-
1
11
,
=
1
2
-
1
11
,
=
9
22
.