题目内容
脱式计算.(能简算的要简算)
1305-386-614
(
+
-
)×12
1.25×32×2.5
10.9-(
+9.6÷4)
1305-386-614
(
| 1 |
| 4 |
| 2 |
| 3 |
| 5 |
| 6 |
1.25×32×2.5
10.9-(
| 4 |
| 5 |
(1)1305-386-614,
=1305-(386+614),
=1305-1000,
=305;
(2)(
+
-
)×12,
=
×12+
×12-
×12,
=3+8-10,
=1;
(3)1.25×32×2.5,
=(1.25×8)×(4×2.5),
=10×10,
=100;
(4)10.9-(
+9.6÷4),
=10.9-(
+2.4),
=10.9-3.2,
=7.7.
=1305-(386+614),
=1305-1000,
=305;
(2)(
| 1 |
| 4 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 1 |
| 4 |
| 2 |
| 3 |
| 5 |
| 6 |
=3+8-10,
=1;
(3)1.25×32×2.5,
=(1.25×8)×(4×2.5),
=10×10,
=100;
(4)10.9-(
| 4 |
| 5 |
=10.9-(
| 4 |
| 5 |
=10.9-3.2,
=7.7.
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