7 |
11 |
1 |
5 |
4 |
11 |
3 |
5 |
=(
7 |
11 |
4 |
11 |
1 |
5 |
3 |
5 |
=1+
4 |
5 |
=1
4 |
5 |
②12.5×8×4×0.25,
=(12.5×8)×(4×0.25),
=100×1,
=100;
③5-
9 |
4 |
45 |
8 |
3 |
5 |
=5?
9 |
4 |
8 |
45 |
3 |
5 |
=5?
2 |
5 |
3 |
5 |
=5-(
2 |
5 |
3 |
5 |
=5-1,
=4;
④4.9×6.4+14×0.36-6.4×3.5,
=(4.9-3.5)×6.4+14×0.36,
=1.4×6.4+1.4×3.6,
=1.4×(6.4+3.6),
=1.4×10,
=14.