神机妙算细又巧(能简算的要写出简算过程)①0.65×14+87×65%?1320②(23?12+16)÷124③76×(123

2025-01-31 02:48:32
推荐回答(1个)
回答1:

①0.65×14+87×65%?
13
20

=0.65×14+87×0.65-0.65,
=0.65×(14+87-1),
=0.65×100,
=65;

(
2
3
?
1
2
+
1
6
1
24

=(
2
3
-
1
2
+
1
6
)×24,
=
2
3
×24-
1
2
×24+
1
6
×24,
=16-12+4,
=8;

76×(
1
23
?
1
53
)
+23×(
1
53
+
1
76
)?53×(
1
23
?
1
76
)

=76×
1
23
-76×
1
53
+23×
1
53
+23×
1
76
-53×
1
23
+53×
1
76

=
76
23
-
76
53
+
23
53
+
23
76
-
53
23
+
53
76

=(
76
23
?
53
23
)+(
23
76
+
53
76
)-(
76
53
-
23
53
),
=1+1-1,
=1.