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能简算的要简算1349×21+28×1349;(34+58)×32;72×571.
题目详情
能简算的要简算
×21+28×
; (
+
)×32; 72×
.能简算的要简算
×21+28×
; (
+
)×32; 72×
.
×21+28×
; (
+
)×32; 72×
.
13 49 13 13 49 49
; (
+
)×32; 72×
.
13 49 13 13 49 49
+
)×32; 72×
.
3 4 3 3 4 4
)×32; 72×
.
5 8 5 5 8 8
.
5 71 5 5 71 71
13 |
49 |
13 |
49 |
3 |
4 |
5 |
8 |
5 |
71 |
13 |
49 |
13 |
49 |
3 |
4 |
5 |
8 |
5 |
71 |
13 |
49 |
13 |
49 |
3 |
4 |
5 |
8 |
5 |
71 |
13 |
49 |
13 |
49 |
3 |
4 |
5 |
8 |
5 |
71 |
13 |
49 |
3 |
4 |
5 |
8 |
5 |
71 |
3 |
4 |
5 |
8 |
5 |
71 |
5 |
8 |
5 |
71 |
5 |
71 |
▼优质解答
答案和解析
(1)
×21+28×
=
×(21+28)
=
×49
=13
(2)(
+
)×32
=
×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
13 49 13 13 1349 49 49×21+28×
=
×(21+28)
=
×49
=13
(2)(
+
)×32
=
×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
13 49 13 13 1349 49 49
=
×(21+28)
=
×49
=13
(2)(
+
)×32
=
×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
13 49 13 13 1349 49 49×(21+28)
=
×49
=13
(2)(
+
)×32
=
×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
13 49 13 13 1349 49 49×49
=13
(2)(
+
)×32
=
×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
3 4 3 3 34 4 4+
)×32
=
×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
5 8 5 5 58 8 8)×32
=
×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
3 4 3 3 34 4 4×32+
×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
32+
5 8 5 5 58 8 8×32
=24+20
=44
(3)72×
=(71+1)×
=71×
+1×
=5+
=5
5 71 5 5 571 71 71
=(71+1)×
=71×
+1×
=5+
=5
5 71 5 5 571 71 71
=71×
+1×
=5+
=5
5 71 5 5 571 71 71+1×
=5+
=5
5 71 5 5 571 71 71
=5+
=5
5 71 5 5 571 71 71
=5
5 71 5 5 571 71 71
13 |
49 |
13 |
49 |
=
13 |
49 |
=
13 |
49 |
=13
(2)(
3 |
4 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
13 |
49 |
13 |
49 |
=
13 |
49 |
=
13 |
49 |
=13
(2)(
3 |
4 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
13 |
49 |
=
13 |
49 |
=
13 |
49 |
=13
(2)(
3 |
4 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
13 |
49 |
=
13 |
49 |
=13
(2)(
3 |
4 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
13 |
49 |
=13
(2)(
3 |
4 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
3 |
4 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
5 |
8 |
=
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
3 |
4 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
5 |
8 |
=24+20
=44
(3)72×
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
5 |
71 |
=(71+1)×
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
5 |
71 |
=71×
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
5 |
71 |
=5+
5 |
71 |
=5
5 |
71 |
5 |
71 |
=5
5 |
71 |
5 |
71 |
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