题目内容
神机妙算细又巧!(能简算的要写出简算过程)
4×0.8×2.5×12.5 2.3×85+2.3×1536.5×99+36.5
0.65×14+87×65%-
(
-
+
)÷
.
4×0.8×2.5×12.5 2.3×85+2.3×1536.5×99+36.5
0.65×14+87×65%-
| 13 |
| 20 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 24 |
①4×0.8×2.5×12.5,
=(4×2.5)×(0.8×12.5),
=10×10,
=100;
②2.3×85+2.3×15,
=2.3×(85+15),
=2.3×100,
=230;
③36.5×99+36.5,
=36.5×(99+1),
=36.5×100,
=3650;
④0.65×14+87×65%-
,
=0.65×(14+87-1),
=0.65×100,
=65;
⑤(
-
+
)÷
,
=(
-
+
)×24,
=
×24-
×24+
×24,
=16-12+4,
=8.
=(4×2.5)×(0.8×12.5),
=10×10,
=100;
②2.3×85+2.3×15,
=2.3×(85+15),
=2.3×100,
=230;
③36.5×99+36.5,
=36.5×(99+1),
=36.5×100,
=3650;
④0.65×14+87×65%-
| 13 |
| 20 |
=0.65×(14+87-1),
=0.65×100,
=65;
⑤(
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 24 |
=(
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=16-12+4,
=8.
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