(1)14÷2×12÷3×13 (2)12×(12+34?56) (3)解方程:(12?14)x=13 (4)解方程:23x÷16=12
(1)14÷2×12÷3×13(2)12×(12+34?56)(3)解方程:(12?14)x=13(4)解方程:23x÷16=12....
(1)14÷2×12÷3×13 (2)12×(12+34?56) (3)解方程:(12?14)x=13 (4)解方程:23x÷16=12.
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(1)
÷2×
÷3×
=
×
÷3×
=
÷3×
=
×
=
;
(2)12×(
+
?
)
=12×
+12×
-12×
=6+9-10
=15-10
=5;
(3)(
?
)x=
x=
x÷
=
÷
x=
;
(4)
x÷
=12
x÷
×
1 |
4 |
1 |
2 |
1 |
3 |
=
1 |
8 |
1 |
2 |
1 |
3 |
=
1 |
16 |
1 |
3 |
=
1 |
48 |
1 |
3 |
=
1 |
144 |
(2)12×(
1 |
2 |
3 |
4 |
5 |
6 |
=12×
1 |
2 |
3 |
4 |
5 |
6 |
=6+9-10
=15-10
=5;
(3)(
1 |
2 |
1 |
4 |
1 |
3 |
1 |
4 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
3 |
1 |
4 |
x=
4 |
3 |
(4)
2 |
3 |
1 |
6 |
2 |
3 |
1 |
6 |
1 |